What documents website marketplaces ask for in due diligence

Last updated: October 13, 2026

Key Takeaways

• The first package is usually basic, but it must be complete enough for review to continue.
• In practice, sellers usually need eight document categories.
• Domain, entity, and account access records are the best place to start.
• The full file is better for serious review; the minimal file is quicker but carries more risk.

Quick answer: most website marketplaces ask for 8 document groups during due diligence, and sellers who prepare them first usually move faster. Website marketplaces ask for documents that prove three things: you own the site, the numbers are real, and the business can survive a transfer. In the context of what documents website marketplaces ask for during due diligence, the fastest way to slow a deal is to send half the file and hope the buyer “fills in the gaps.” I write about digital-asset transfers and online business sales, and the same pattern shows up every time: clean records move a deal; messy records drag it into endless follow-up.

What document set do buyers usually want first?

Therefore, they usually want ownership proof, traffic proof, revenue proof, and access proof in that order. The first package is rarely exotic, but it has to be complete enough for a buyer, broker, or marketplace reviewer to decide whether to keep going.

The core file usually includes:

• Proof the domain is registered to the seller or the selling entity
• Platform access or screenshots from analytics and monetization accounts
• Revenue statements for the last 12 months, sometimes longer for larger deals
• Traffic reports from Google Analytics 4, Search Console, or ad platforms
• A short operating summary that explains what the site does and how it makes money

That sounds simple until a marketplace asks for the version that matches the legal entity, not the informal owner. If the domain is in a personal registrar account, the ad account is under an LLC, and Stripe pays into a different bank account, the reviewer will ask for a chain of evidence that ties those pieces together.

The documents that matter most are the ones that answer a buyer’s real questions: Is this asset yours? Are these numbers reliable? Can I transfer it without losing the income stream next month? A pretty deck does not answer those questions. A dated registrar record, a processor statement, and a traffic export usually do.

The weak spot for many sellers is not fabrication; it is fragmentation. One document says one name, another says a different name, and the buyer has to guess whether that is a harmless setup choice or a problem with title. If I had to choose where to spend the most time, I would start with ownership and revenue trail, because those are the two places where a missing page can kill trust fastest.

What documents do website marketplaces ask for during due diligence?

Next, they ask for the documents that verify title, economics, traffic, and risk. In practice, that means eight categories.

1. Identity and entity documents

   • Government ID for the owner or signatory
   • Articles of organization, incorporation papers, or equivalent entity formation documents
   • EIN letter or local tax registration, if the sale runs through a company

2. Domain and asset ownership records

   • Registrar account screenshots or export showing the domain registration
   • WHOIS history, when available
   • Trademark registrations, if the brand name is protected
   • A list of included assets: domain, subdomains, social accounts, email lists, code repositories, apps, and media

3. Financial records

   • Profit and loss statements
   • Bank statements that match the revenue line items
   • Payment processor reports from Stripe, PayPal, Paddle, or similar
   • Tax returns or filings when the marketplace requests extra verification

4. Traffic and audience records

   • Google Analytics 4 exports
   • Google Search Console data
   • Ad network dashboards, when traffic monetization depends on them
   • Email platform metrics if email revenue or lead flow is material

5. Operating records

   • Supplier or contractor agreements
   • Content production workflow notes
   • SOPs for updates, publishing, customer support, or ad placement
   • License documents for images, plugins, stock media, software, or fonts

6. Compliance and risk records

   • Privacy policy, terms of service, and cookie policy
   • DMCA or copyright correspondence, if relevant
   • Any notices from ad networks, payment processors, or platforms
   • Data processing agreements if the site handles customer data

7. Transfer-readiness documents

   • Credential list or transfer checklist
   • 2FA method description and recovery process
   • Hosting details
   • Employee or contractor transition plan, if people are involved

8. Change history

   • Notes on major traffic drops or spikes
   • Notes on content migration, redesigns, or redirects
   • Any sharp revenue changes and the reason they happened

The strongest due diligence file does not just prove current performance. It explains the history behind the current performance, especially if there was a 301 redirect, a redesign, a sanctions issue with an ad account, or a sudden channel shift. Marketplaces dislike mystery more than they dislike modest numbers.

Which documents prove ownership without wasting time?

Because ownership is the first thing reviewers test, domain, entity, and account access records prove ownership best, and they should be organized before anything else. That is the part of diligence most likely to stall if it is sloppy.

For the domain, a registrar screenshot showing the exact registration name and expiration date is useful, but not always enough on its own. A WHOIS snapshot, if privacy settings and registry rules allow it, adds another layer. If the domain changed hands before, I would include the prior transfer confirmation or a purchase invoice. That is especially important for aged domains, because a marketplace reviewer may want to see that the seller did not simply inherit someone else’s asset without documentation.

For the business entity, articles of incorporation, operating agreement, or equivalent formation papers help tie the sale to the right legal person. If the site lives inside a personal account and the sale will be asset-based rather than equity-based, that distinction has to be clear. Otherwise the buyer may wonder who can actually sign.

For monetization accounts, screenshots alone are weak. A screenshot can show balance, but not history. A processor export or statement covering several months is stronger because it shows dates, payout cadence, chargebacks, and refunds. If the marketplace allows read-only access during review, that is often better than static images.

This is the section where I see the most avoidable friction. Sellers assume ownership is obvious because they built the site. Buyers do not work that way. They need a chain from legal entity to asset to cash flow. If any link is missing, the buyer starts discounting the deal or asking for indemnities.

Who should slow down and over-document here? Anyone selling through a marketplace that runs escrow, anyone with co-founders, and anyone whose assets are spread across multiple logins. Who can keep it lighter? A tiny one-person site with one domain, one ad account, one bank account, and straightforward records.

What evidence of traffic and revenue do they care about most?

Then they care most about traffic sources that can be checked and revenue that can be traced. That usually means Google Analytics 4, Search Console, and processor statements before it means vanity screenshots or dashboard totals.

Traffic proof matters because reported sessions, pageviews, and clicks can be inflated, misconfigured, or misread. A buyer wants to know whether the site earns from direct type-in traffic, search, social, email, or paid campaigns. A one-month spike from a referral source is very different from steady search demand over 12 months. If the site depends on one platform, the marketplace will look harder at concentration risk.

Revenue proof matters because marketplaces care less about top-line claims than about repeatable net cash flow. Common documents include:

• Stripe balance and payout reports
• PayPal transaction exports
• Amazon Associates reports, if affiliate income is material
• Ad network statements, such as Mediavine or Raptive reports
• Shopify or WooCommerce order summaries for stores
• Tax filings or year-end statements for higher-value assets

The important detail is reconciliation. If the P&L says one thing and the Stripe export says another, the reviewer will ask which number is real. That mismatch is not always fraud; sometimes it is refunds posted later, merchant fees not counted properly, or owner expenses mixed into the books. Still, the burden shifts to the seller to explain it.

A generic article often leaves out one painful truth: marketplaces do not just want “proof of income.” They want proof that the income will likely continue after transfer. That is why they ask for channel mix, renewal rates, churn, repeat purchase behavior, or email list health when those numbers matter. A site with most traffic tied to one keyword or one social account will usually attract more questions than a broader asset with lower concentration.

If the business is small, a 3- to 6-month statement trail may be enough for an early review. If the asset is larger or the seller wants a higher multiple, a full 12 months of clean exports is the safer expectation. For broader context on analytics and reporting, see Google Analytics Help and Google Search Central.

What do marketplaces check for legal and operational risk?

After traffic and revenue, they check for anything that could interrupt ownership, monetization, or transfer. That means policies, licenses, claims, disputes, and technical dependency documents.

The legal basics are privacy policy, terms of service, cookie policy, and any consent or opt-in logs if the site collects data. If the business sells into the European Union or handles European traffic, GDPR-related practices can become part of the review. If the site has users in California, CCPA-style disclosures may also matter. I am not giving legal advice here; a lawyer should review anything that touches privacy, IP, or regulated content. For those issues, sellers often also consult the FTC business guidance and the EU GDPR portal.

Operational risk is the quieter but very real category. A buyer may ask for:

• Plugin or software license receipts
• Stock photo and video licenses
• Contractor NDAs or work-for-hire agreements
• Brand asset files
• Support inbox access patterns
• SOPs for publishing, fulfillment, or moderation

If the site uses freelancers, the key question is whether the content or code actually belongs to the seller. An invoice alone may not transfer copyright. A signed assignment or work-made-for-hire agreement is far stronger. That detail is easy to miss and expensive to fix later.

Another common gap is dependency risk. A site can look healthy until a reviewer notices it depends on one tool with a single login, one freelancer who knows the workflow, or one plugin that has not been updated in years. The buyer wants to know whether the business is transferable or just owner-dependent.

The site type changes the file. A content site needs licensing and traffic records. A SaaS asset needs code ownership, repository access, and subscription metrics. A store needs supplier agreements and fulfillment records. A lead-gen site needs call logs or CRM exports. The category decides the document stack.

The honest side-by-side

Therefore, the broad file is stronger for serious marketplace review, while the minimal file is faster but riskier. Here is the trade-off in plain terms.

My view is simple: the minimal set is only worth using if the buyer is still deciding whether the asset deserves deeper review. The moment the conversation turns to price, transfer timing, or escrow, the full file is the safer choice.

Which documents should a seller prepare first?

Because the buyer will ask for proof before polish, prepare the documents that prove ownership and money flow first. I would not start with SOPs or brand assets unless the business is already clean on title and revenue.

The order I would use is:

1. Domain registration proof
2. Entity formation documents
3. 12 months of revenue exports
4. 12 months of traffic exports
5. Bank statements that match deposits
6. The remaining licensing records

That order gives the reviewer the fastest path from title to cash to transfer. If the first five items are clean, the rest of the file is easier to interpret.

Drafted with AI; not yet reviewed by a person.