What Paperwork Is an Independent Contractor Asked For?
Short answer
A hiring client usually asks an independent contractor for four things: a completed Form W-9, a certificate of insurance, a signed agreement, and some resolution of the workers' compensation question — either proof of a policy or whatever filing the state provides for a sole proprietor outside the system. Larger clients add requests for specific endorsements and, at the end of a term, cooperation with an audit.
The tax form
Form W-9 collects the contractor's legal name, business structure, address, and taxpayer identification number — an employer identification number or, for some sole proprietors, a Social Security number. It is a request for information from the payer to the payee; it is not itself filed with a tax agency by the contractor. The name on the W-9 is also the name that should appear as the insured on the certificate, and mismatches between the two are a routine cause of paperwork being returned.
The certificate request
The client asks the contractor, who asks their agent, who issues the certificate naming the client as certificate holder. The client's requirements normally specify which lines of coverage and what limits the contract calls for. What the resulting document does and does not establish is covered in how to read a certificate of insurance, and the coverage categories themselves in what kinds of insurance contractors carry.
Endorsement requests
Where the contract requires additional insured status, a waiver of subrogation, or primary and non-contributory wording, the client may ask for copies of the endorsements rather than accepting the certificate's report of them. These are policy documents. Whether they can be provided depends on what the policy actually includes, which is a question for the agent who placed it.
The workers' compensation question
This is the request that generates the most back-and-forth for solo contractors. Workers' compensation is a state-administered system covering employees, and a contractor with no employees may fall outside it. States differ in how they handle that: some provide an exemption filing or affidavit, some treat certain business structures differently, and some allow a sole proprietor to elect into the system. Hiring clients often ask for coverage regardless of employee count, because uninsured subcontracted work can be treated as the hiring party's own exposure at audit.
What the correct filing is for a given contractor in a given state is a question for that state's workers' compensation agency and a licensed agent. It is not answerable in general terms, and general answers found online are frequently written about a different state.
The audit at the end of the term
Many commercial policies are auditable. After the policy period, the carrier reconciles the estimated exposure against actual figures and requests records — payroll summaries, receipts, and certificates collected from subcontractors. Certificates that were never collected during the year tend to surface here, which is why tracking them through the term is less work than reconstructing them afterward.
These documents carry identifying data
The packet an independent contractor sends out contains a legal name, address, taxpayer identification number, and sometimes bank details for payment. That is a meaningful concentration of identifying information moving by email, often to an address the contractor has not corresponded with before.
Two public resources are worth knowing in advance rather than at the moment something goes wrong. The FTC's IdentityTheft.gov is the official government site for reporting identity theft and generating a step-by-step recovery plan. The FTC's guidance on credit freezes and fraud alerts is the primary-source explanation of what a freeze does, the three types of fraud alert and how long each lasts, and how freezes work for minors. Neither is insurance guidance; both are the authoritative descriptions of tools that exist.
For thinking about which of these documents actually need protecting and from whom, the Electronic Frontier Foundation's Surveillance Self-Defense guides introduce threat modeling — asking what you have, who might want it, and what you are willing to do about it — along with scenario walkthroughs on device and messaging security.
Where to look next
The references below are cited for the identity-data section only; none describe insurance requirements or tax obligations. For the workers' compensation rules that apply to you, the state agency and a licensed agent are the authorities, and for tax questions, a tax professional.