How Workers’ Comp Can Follow Supplied Employees to a Host Business

An alternate employer endorsement is an addition to a workers compensation and employers liability policy. It can extend specified coverage treatment to a customer or host business listed as an alternate employer for qualifying injuries involving employees supplied by the policy’s named insured. It is commonly associated with temporary staffing, but the actual policy wording and labor relationship determine whether it applies. IRMI defines the endorsement as scheduled protection under a workers compensation policy.

That definition leaves several practical questions unanswered. Whose policy carries the endorsement? Which workers and assignments fall within it? Does it replace the host’s own workers compensation policy? Does it prevent an injured temporary worker from suing the host?

The endorsement’s name alone proves little. Protection depends on the issued form, completed schedule, applicable policy states, employment arrangement, labor contract, assignment facts, and governing law. A certificate or contractual requirement cannot substitute for that review.

What an alternate employer endorsement means

A typical arrangement involves three parties:

1. Labor supplier or staffing agency: The worker’s employer and the named insured on the workers compensation policy.
2. Customer or host business: The organization using or directing the supplied worker and identified in the endorsement as the alternate employer.
3. Supplied employee: The labor supplier’s employee who is assigned to perform work for the host.

In the wording reproduced for WC 00 03 01 A, Part One—Workers Compensation Insurance—and Part Two—Employers Liability Insurance—apply as though the scheduled alternate employer were insured. That treatment is limited to covered bodily injury involving the named insured’s employees while they are in special or temporary employment with the alternate employer. The schedule identifies the alternate employer and state and can restrict coverage to a named contract or project. The Indiana Compensation Rating Bureau reproduces and explains these provisions.

Consider a staffing agency that employs a warehouse worker and assigns that person to Client Distribution LLC. The agency’s insurer issues an endorsement listing Client Distribution LLC, the state where the temporary work will occur, and, if required, the applicable contract or project. If the worker is injured during that assignment, the agency’s policy may respond to the client’s covered workers compensation or employers liability exposure.

The word may is essential. An alternate employer endorsement is not:

• A separate workers compensation policy
• Automatic protection for every staffing customer
• Coverage for everyone working at the host’s premises
• Blanket recognition of every parent, subsidiary, affiliate, or trade name
• Proof that every location, state, contract, project, or duty is included
• A guarantee that every claim or lawsuit against the host will be covered

Temporary staffing is a common use, but requests also arise with leased, loaned, seasonal, contracted, and project-based labor. Those labels are not interchangeable. Professional employer organization, or PEO, arrangements may involve different forms, regulations, and employment features.

The reliable starting point is to identify the actual labor relationship and then read the complete policy and endorsement alongside the staffing contract and current assignment facts.

Whose policy carries the endorsement and how coverage flows

The endorsement is generally attached to the labor supplier’s workers compensation policy. The staffing agency or other supplier remains the named insured, while the customer is scheduled as the alternate employer. It is not ordinarily an endorsement the host adds to its own policy.

Coverage generally flows as follows:

1. The supplier employs the worker. The person is on the supplier’s payroll or otherwise qualifies as its employee under the arrangement and applicable law.
2. The supplier assigns the worker to a host. The worker enters special or temporary employment with the customer.
3. The supplier’s insurer issues the endorsement. The form or schedule identifies the host and may specify states, contracts, projects, or other limitations.
4. An injury occurs during the assignment. The worker, injury, work, place, and timing must fall within the policy and endorsement.
5. The policy responds if the loss is covered. Parts One and Two can apply as though the scheduled host were insured for that defined exposure.

Travelers describes its alternate employer offering in similar terms: workers compensation and employers liability coverage apply as though the customer were insured for injury to leased or loaned employees, and Travelers will not ask another insurer of that customer to share a loss covered by the endorsement. That description is carrier-specific, but it illustrates the commonly described coverage flow and noncontribution concept. See Travelers’ explanation of alternate employer coverage.

Part One and Part Two serve different functions

Part One—Workers Compensation Insurance addresses benefits required by applicable workers compensation law. In the reproduced endorsement wording, if the insurer cannot pay those benefits directly to the person entitled to them, it reimburses the alternate employer for benefits the law requires that employer to pay.

Part Two—Employers Liability Insurance addresses covered employer liability arising from employee bodily injury, subject to the policy’s terms, exclusions, and limits. Its inclusion is not a promise that every negligence allegation, contractual demand, or lawsuit against the host will be covered.

The limiting phrase in the noncontribution provision is “loss covered by the endorsement.” The provision does not transform an uncovered loss into a covered one or correct defects such as:

• An incorrectly named host
• An unlisted state
• A worker who is not an employee of the named insured
• Work outside a scheduled contract or project
• A policy exclusion
• A labor structure requiring different treatment
• An assignment continuing after the policy ends

The named insured may be charged premium for employees while they are in special or temporary employment with the alternate employer. The effect depends on the policy, payroll, classifications, states, carrier, and arrangement. The endorsement should not be assumed to be free or inexpensive.

Who and what the endorsement may cover

Coverage generally concerns employees of the named insured while they are in special or temporary employment with the scheduled alternate employer. The first two questions are therefore:

• Is this person an employee of the policy’s named insured?
• Was the person in qualifying special or temporary employment with the scheduled host when the injury occurred?

The standard schedule reproduced by the Indiana Compensation Rating Bureau identifies the alternate employer, the state of temporary employment, and any named contract or project limitation. Carrier-specific forms, policy provisions, or underwriting documents may impose additional restrictions involving locations, operations, duties, worker groups, or assignment periods. Those broader variables should be confirmed rather than assumed.

The applicable state is particularly important. Descriptions of WC 00 03 00 and related editions state that the state where temporary employment occurs generally must appear in the policy’s applicable state listing. They also explain that scheduling may be specific to a host or job, subject to form and market variation. See the third-party overview of WC 00 03 00 and related editions.

A contract- or project-specific entry can narrow the result. If the schedule applies only to work under Contract A or at Project Alpha, an injury during Contract B or Project Beta may fall outside the endorsement even if the same host and worker are involved.

Example 1: Likely within the described scope

A staffing agency employs a forklift operator and assigns the worker to Warehouse Operations Inc. The endorsement correctly lists Warehouse Operations Inc., the state where the warehouse is located, and the applicable assignment. The worker is injured while performing the listed warehouse duties during the policy period.

Those facts fit the endorsement’s general structure. Actual coverage would still depend on the complete policy, endorsement, and claim facts.

Example 2: Potentially outside the scope

The endorsement lists Parent Holdings Inc., but Subsidiary Fulfillment LLC signs the staffing agreement, directs the worker, and operates the site. The companies share ownership and branding but are separate legal entities.

Listing the parent does not necessarily extend coverage to the subsidiary. The scheduled organization should match the legal entity that receives or directs the supplied labor. Affiliates should be included expressly when the carrier agrees to include them.

Example 3: Requiring policy review

A worker is assigned to clerical duties at a scheduled office in one state. The host later sends that worker to another state to operate warehouse machinery at a different location.

The state, location, duties, and hazard have changed, and the applicable contract or classification may also have changed. The parties should not assume that the original endorsement follows the worker. Where possible, the supplier should ask its insurer or broker to review the reassignment before it begins.

Some forms or insurers may permit broader scheduling language such as “all” or “any” when a named insured supplies temporary workers. That option is not universal. Its availability depends on the insurer, form, state, and market, and broad wording remains subject to every other policy condition and limitation.

Important limits: what the endorsement does not automatically do

An alternate employer endorsement provides relationship-specific protection. It should not be treated as a substitute for the host’s complete workers compensation, liability, and contractual risk-management program.

It generally does not cover the host’s direct employees

The host’s permanent, part-time, or seasonal employees do not become employees of the labor supplier merely because an alternate employer endorsement exists. The endorsement generally concerns supplied employees of the named insured, not workers the host hires directly.

Mixed-workforce incidents therefore require careful sorting. Two people can work side by side at the same location yet implicate different policies because one is supplied by a staffing company and the other is directly employed by the host.

It does not satisfy every independent statutory obligation

The reproduced WC 00 03 01 A wording states that the endorsement is not intended to satisfy the alternate employer’s duty to secure its workers compensation obligations. It also says the insurer will not file evidence of that insurance for the alternate employer with a government agency. The same wording applies injury-related duties to both parties, recognizes the insurer’s rights to defend and inspect, and generally permits cancellation without notice to the alternate employer. These limitations appear in the reproduced endorsement text.

Whether a host must maintain a policy in its own name depends on the jurisdiction, its direct workforce, and the employment facts. The endorsement should not be used as a shortcut around that legal analysis.

It does not grant every policyholder right

The alternate employer receives the treatment stated in the endorsement for the defined supplied-worker exposure. It does not necessarily become identical to the named insured for every policy purpose or receive every right held by the policyholder.

Scope can vary by state, carrier, form, worker, legal entity, location, project, and duty. Commercial insurance guidance therefore recommends matching the endorsement to the actual labor arrangement instead of promising broad protection based on its title. Total CSR explains these implementation distinctions.

It does not create blanket host protection

Common mismatches include:

• A trade name is used instead of the correct legal name.
• A parent is listed, but the operating subsidiary is not.
• Workers cross into a state not addressed by the policy.
• A scheduled project ends, but workers move to a different project.
• The endorsement covers one contract while the injury arises under another.
• The worker’s duties materially depart from the stated assignment.
• Temporary staffing develops into a different leasing or co-employment structure.
• Work continues after the supplier’s policy is canceled or expires.

These are not merely clerical details. They can determine whether the host, worker, place, and work fit the coverage issued.

Labor structures are not interchangeable

A conventional staffing arrangement may involve a supplier hiring workers and placing them with a client for temporary or special assignments. A PEO arrangement may involve broader payroll, human-resources, co-employment, or regulatory functions. Employee leasing, subcontracting, independent contracting, seasonal labor, and borrowed-worker arrangements create different factual and legal questions.

The label in the service agreement is not conclusive. The parties should identify who hires, pays, assigns, supervises, disciplines, removes, and can terminate the worker, then ask whether the insurer’s form is designed for that structure.

A general contractor, project owner, or property owner also does not automatically qualify as an alternate employer simply because a contract requests the endorsement. The carrier must accept the arrangement, and the employment and legal facts still matter.

Alternate employer coverage versus other insurance and contract terms

Alternate employer status is frequently confused with additional-insured status. The concepts are not interchangeable, and “additional insured” should not be used as shorthand for alternate employer treatment.

Tool or document	Where it appears	Core function	What it does not prove or replace
Alternate employer endorsement	Workers compensation and employers liability policy	Applies specified coverage treatment to a scheduled host for qualifying injuries involving the named insured’s supplied employees	Does not automatically cover direct employees, every assignment, or every lawsuit
CGL additional-insured endorsement	Commercial general liability policy	Extends specified liability protection to another person or organization under the CGL wording	Does not create alternate employer status under a workers compensation policy
Waiver of subrogation	Policy endorsement or other permitted arrangement	Restricts specified recovery rights after an insurer pays a covered loss	Does not schedule the customer as an alternate employer or create the endorsement’s coverage
Contractual indemnity or hold-harmless provision	Staffing, service, or construction contract	Allocates specified financial, defense, or liability responsibilities between the contracting parties	Is not insurance and is not automatically fulfilled by the endorsement
Certificate of insurance	Evidence document summarizing stated policy information	Provides a convenient snapshot for administrative review	Is not the policy or endorsement and does not establish the complete schedule, exclusions, or restrictions

CGL and workers compensation endorsements must be evaluated separately. Insurance brokerage commentary addressing action-over exposure, for example, discusses the alternate employer endorsement and CGL treatment for temporary or leased workers as distinct coverage strategies. Newfront’s discussion illustrates that separation.

A waiver of subrogation addresses whether an insurer retains specified recovery rights after paying a covered loss. An alternate employer endorsement instead applies defined workers compensation and employers liability treatment to a scheduled host. Having one does not establish the other.

Indemnity, defense, and hold-harmless clauses belong to the parties’ contract. Their scope and enforceability depend on their wording and governing law. Insurance may fund some obligations, but an endorsement does not rewrite the contract or guarantee that every contractual obligation is insured.

Use a practical document-review sequence

The following is a review sequence, not a universal legal hierarchy:

1. Complete policy, information page, and underlying terms: Confirm the named insured, policy period, listed states, limits, exclusions, and governing provisions.
2. Issued endorsement and completed schedule: Confirm the exact alternate employer, form edition, state, contract, project, and restrictions. The policy and endorsements must be read together.
3. Staffing or labor contract: Review insurance-procurement, defense, indemnity, hold-harmless, notice, and assignment requirements. The contract can create obligations between the parties but does not itself amend the policy.
4. Certificate of insurance: Use it as a summary and tracking document, not as proof of complete policy wording.
5. Separate CGL endorsements: Confirm any additional-insured or temporary- and leased-worker treatment independently.

If a certificate says “alternate employer included” but the issued schedule omits the relevant subsidiary or project, the certificate’s shorthand does not add the missing entity or work to the policy.

How to request and verify the endorsement before work begins

The host and labor supplier should complete their review before supplied employees begin work. Waiting until after an injury can turn a correctable scheduling problem into a coverage dispute.

Step 1: Classify the labor arrangement

Determine whether the relationship involves temporary staffing, a PEO, employee leasing, contractor labor, subcontracting, seasonal placement, project labor, or another structure. Do not rely only on the title of the agreement.

Document who:

• Employs and pays the worker
• Recruits and screens the worker
• Assigns day-to-day work
• Controls workplace activities
• Provides tools and training
• Can discipline, remove, or terminate the worker
• Handles injury reporting and return-to-work coordination

These facts help the insurer, broker, and counsel identify the relevant form and legal framework.

Step 2: Review the staffing contract

Identify what the agreement actually requires, including:

• Alternate employer treatment
• Workers compensation and employers liability coverage
• Required limits
• Applicable states
• Covered entities and affiliates
• Contract or project restrictions
• Cancellation or change notices
• Defense and indemnity obligations
• Hold-harmless provisions
• Waiver-of-subrogation requirements
• Separate CGL additional-insured requirements

A contract can require the supplier to seek an endorsement, but it cannot force an insurer to issue an unavailable form or create coverage that the policy does not provide.

Step 3: Ask the supplier to contact its insurer or broker

Because the endorsement generally attaches to the supplier’s policy, the supplier should submit the request through its insurance channel. The request should accurately describe the labor arrangement, host entities, work, states, and assignment rather than simply repeating contractual boilerplate.

Step 4: Obtain insurer approval

The carrier may request information about payroll, classifications, duties, locations, states, duration, supervision, contracts, and loss exposure. Approval should not be assumed because another customer or assignment received similar treatment.

Step 5: Obtain the issued endorsement and schedule

A request, binder note, email, or certificate is not the final endorsement. Obtain a legible copy of the issued form and completed schedule.

References identify forms including WC 00 03 01 A and WC 00 03 00, along with related editions and state-specific variants. These identifiers should not be treated as universal; the actual form attached to the policy controls. The WC 00 03 00 overview describes the related numbering and edition variation.

Step 6: Compare the documents with actual operations

Use this verification checklist:

• [ ] The supplier’s exact legal name matches the named insured.
• [ ] Each host entity needing treatment is listed by its exact legal name.
• [ ] Relevant subsidiaries are expressly included rather than assumed.
• [ ] Trade names are not substituted for legal entities without confirmation.
• [ ] The form number and edition are appropriate for the insurer and state.
• [ ] Policy effective and expiration dates cover the assignment.
• [ ] Assignment dates fall within the policy period.
• [ ] Every state where workers will perform services is addressed.
• [ ] Locations match where the work will occur.
• [ ] Scheduled contracts and projects match the signed agreement and actual work.
• [ ] Worker groups and duties are accurately described where required.
• [ ] All schedule restrictions have been reviewed.
• [ ] Part One treatment is included as intended.
• [ ] Part Two treatment is included as intended.
• [ ] Employers liability limits satisfy the contract, if applicable.
• [ ] Cancellation, nonrenewal, and material-change expectations are documented.
• [ ] CGL, waiver, indemnity, and hold-harmless requirements are handled separately.

Commercial broker guidance likewise recommends obtaining the actual endorsement instead of relying on a certificate and distinguishes alternate employer treatment from CGL additional-insured and waiver provisions. See The Coyle Group’s endorsement guide.

Finally, qualified insurance and legal professionals should reconcile the policy with the labor contract. The insurance review should determine what the issued policy says; the legal review should address employment status, statutory obligations, indemnity, defense, and enforceability under governing law.

Keeping coverage aligned during the assignment

Alternate employer coverage is not a one-time certificate-collection task. The endorsement reflects a particular set of facts. When those facts change, the coverage analysis may change.

Recheck the endorsement when the parties:

• Add a state
• Open or move to another location
• Change worker duties
• Transfer workers to another contract or project
• Add an affiliated host entity
• Extend the assignment
• Add a new worker category
• Change supervision or control
• Convert temporary staffing into another labor structure
• Renew, replace, or cancel an insurance program

Responsibility for reporting these changes should be assigned in advance. Operations personnel often learn about new duties or transfers before the insurance team does, so monitoring cannot exist only in the annual renewal file.

Duties after an injury

The applicable policy determines the required response. Reproduced form wording applies injury-related duties to both the named insured and alternate employer and requires the alternate employer to recognize the insurer’s rights to defend and inspect.

A practical administrative process is to:

1. Address immediate safety and emergency needs.
2. Notify the staffing firm promptly.
3. Notify the appropriate insurers or claims contacts as required.
4. Identify the worker’s legal employer and the host entity directing the assignment.
5. Record the date, state, location, duties, and project involved.
6. Preserve the labor contract, policy, endorsement, schedule, certificate, assignment records, and relevant communications.
7. Follow policy reporting and cooperation requirements.
8. Avoid unsupported promises about coverage, fault, employer status, or immunity.

This framework does not replace the reporting instructions in the policy or jurisdiction-specific claims advice.

Cancellation and notice risk

Commonly described form wording allows the supplier’s policy to be canceled according to its terms without notice to the alternate employer. State requirements, policy provisions, or negotiated arrangements may produce a different result. A third-party form explainer similarly notes that notice is not necessarily provided to the alternate employer.

A certificate holder should not assume that requesting notice on a certificate creates a policy right. Ask:

• Who receives cancellation notice?
• Is notice required by the policy, an endorsement, state law, or a separate agreement?
• How much notice applies?
• Does the arrangement address nonrenewal?
• Will the host receive notice of material endorsement changes?
• Who monitors renewal and replacement coverage?

Review the documents before placement, at each renewal, and whenever assignment facts change. Long-running assignments also benefit from periodic confirmation that the listed entities, work, locations, and states remain accurate.

Does the endorsement prevent a lawsuit against the host?

Not necessarily. An alternate employer endorsement may affect coverage and legal arguments, but it does not guarantee that an injured supplied worker cannot sue the host.

Three separate questions must be analyzed:

1. Does the policy cover the host for this injury?
2. Is the host legally considered an employer, special employer, borrowed employer, statutory employer, or co-employer under applicable law?
3. If the host has employer status, does workers compensation provide the worker’s exclusive remedy against that host for this claim?

A favorable answer to the coverage question does not automatically resolve the other two. Coverage is interpreted under the policy, while employment status and exclusive-remedy immunity depend on governing law and facts such as the contracts, control over the work, nature of the assignment, and relationship among the parties.

Terms such as borrowed servant, special employer, statutory employer, co-employer, and exclusive remedy have jurisdiction-specific meanings. They should not be used interchangeably in contracts or coverage requests.

A historical Texas illustration—not a current nationwide rule

A law-firm article published in 2011 discussed Texas statutes and reported decisions involving staff leasing and temporary labor. It reported authority treating a business listed through an endorsement as receiving policy benefits similar to a named insured and discussed a Texas appellate decision involving employer status. Because the article is dated secondary commentary rather than current primary authority, it should be read only as a historical illustration—not as proof of present Texas law or the rule in another jurisdiction. See the Texas-focused commentary republished by Lexology.

Upper-tier contractor situations require similar caution. A 2018 trade-publication response theorized that scheduling a general contractor or project owner could affect a third-party-over claim or an exclusive-remedy argument. The author expressly characterized the proposed result as theoretical, said it had not meaningfully been tested in court, and acknowledged that the upper-tier party might not actually be the worker’s employer. IA Magazine presents that discussion as qualified industry opinion.

Avoid categorical statements such as:

• “The endorsement always makes the host a co-employer.”
• “The employee can only collect workers compensation.”
• “The host cannot be sued.”
• “Listing the project owner creates tort immunity.”
• “The endorsement closes every negligence claim.”

Use this decision framework instead:

• Coverage: Ask the insurer or broker to confirm how the complete policy and endorsement address the host, worker, assignment, and alleged injury.
• Employment status and immunity: Ask counsel to evaluate current statutes and case law in the relevant jurisdiction.
• Contractual risk transfer: Review defense, indemnity, hold-harmless, CGL, and waiver provisions separately.

Frequently asked questions

Does a host employer still need its own workers compensation policy?

That depends on the host’s direct workforce, jurisdiction, and labor arrangement. The alternate employer endorsement generally does not insure the host’s direct employees or satisfy every independent legal obligation to secure workers compensation coverage. Insurance-agency guidance addressing temporary labor similarly recommends that the client maintain its own workers compensation policy while separately obtaining the supplier’s endorsement. See InsuranceTrak’s discussion of the host’s separate policy.

The host should obtain jurisdiction-specific advice rather than assuming the endorsement replaces coverage required in its own name.

Can a temporary worker still sue a company listed as an alternate employer?

Possibly. Being listed may affect available coverage and arguments about employer status or exclusive remedy, but it does not guarantee immunity. The outcome depends on current law, policy wording, the employment relationship, control over the work, contracts, and claim facts.

Historical Texas commentary has discussed decisions in which alternate employer status affected coverage and employer-status analysis, but that secondary source is dated and cannot establish the current rule in any jurisdiction. Counsel should verify current primary authority before advising the host.

Is a certificate of insurance enough to prove alternate employer coverage?

No. A certificate summarizes stated insurance information; it is not the endorsement itself and does not establish the complete wording, schedule, listed states, contracts, projects, exclusions, or restrictions. Broker guidance specifically recommends obtaining and reviewing the issued endorsement rather than relying solely on a certificate. The Coyle Group makes that distinction in its implementation guide.

Obtain the complete endorsement and schedule, then compare them with the policy, labor contract, and actual assignment.

Will the alternate employer be notified if the staffing agency’s policy is canceled?

Not necessarily. Common form descriptions state that cancellation may occur without notice to the alternate employer, although policy wording, state requirements, or a negotiated arrangement can change the result.

Verify who receives notice of cancellation, nonrenewal, and material changes, how much notice applies, and who will monitor renewal or replacement coverage.

Is WC 00 03 01 A the form used for every alternate employer endorsement?

No. Industry sources reference WC 00 03 01 A, WC 00 03 00, related editions, and state- or insurer-specific variants. Newfront, for example, identifies WC 00 03 01 A in its temporary-labor discussion, but that does not make the identifier universal. See Newfront’s form reference.

Check the form number and edition actually attached to the policy, then read its wording and completed schedule. The identifier alone does not show which entities, workers, states, contracts, projects, or assignments are covered.

The practical takeaway

An alternate employer endorsement can connect a labor supplier’s workers compensation and employers liability policy to a properly scheduled host for a defined supplied-worker exposure. Its title alone does not prove that the right entity, worker, state, assignment, contract, or project is covered.

Before relying on the endorsement, compare the complete policy and schedule with the staffing contract and actual operations. Confirm exact legal entities, states, locations, duties, projects, and dates. Monitor cancellation, renewal, and operational changes. Maintain separate coverage for direct employees when required.

Most importantly, separate the questions that are often blurred together: what the policy covers, what the labor contract requires, whether the host has legal employer status, and whether exclusive-remedy protection applies. Those questions require policy-specific insurance review and current, jurisdiction-specific legal analysis.