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If you run a marketplace or multi-vendor platform, you already know that cookies are everywhere, tracking visitors, personalizing ads, measuring performance, and sometimes collecting data you didn't realize you were collecting. Your cookie policy is the legal document that tells users exactly what's happening with their data, and getting it wrong can trigger fines from regulators like the FTC, GDPR authorities, or your home country's data protection office. This checklist walks you through reviewing your marketplace's cookie policy to ensure it's complete, transparent, and defensible.

TL;DR

  • Audit all third-party scripts first: Analytics, pixels, chatbots, and payment processors all drop cookies, document every one before you write or review your policy.
  • Separate essential from non-essential cookies: Only essential cookies (login sessions, CSRF tokens, fraud prevention) can be active without explicit user consent; everything else requires opt-in.
  • Be specific and honest: Generic statements like "we use cookies to improve your experience" won't survive regulatory scrutiny; name the cookie, its purpose, and its lifespan.
  • Update your policy after every integration change: Adding a new payment processor, analytics tool, or marketing pixel means your cookie policy is now incomplete.
  • Test your consent banner against real cookies: Many teams have a great policy but a consent tool that doesn't actually block cookies, use Terms Doctor or manual testing to verify.

Why cookie policies matter for marketplaces

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Marketplaces are complex. Unlike a simple blog or e-commerce store, you're likely running:

  • Multiple third-party payment processors (Stripe, PayPal, Square) that embed their own tracking code
  • Analytics stacks spanning Google Analytics, Mixpanel, Amplitude, or custom data warehouses
  • Advertising pixels for retargeting (Facebook, Google, LinkedIn, TikTok, Amazon)
  • Vendor management systems that may include their own cookies for performance tracking
  • Chat or support widgets (Intercom, Zendesk, Drift) that set session cookies
  • A/B testing frameworks (Optimizely, VWO, LaunchDarkly) that track experiment participation
Each of these tools is dropping cookies into your users' browsers. If your cookie policy doesn't disclose them, or worse, if it says you're not using cookies when you are, regulators will treat it as deception. The FTC has issued consent decrees against companies for overstating privacy practices, and GDPR fines can reach €20 million or 4% of global annual revenue, whichever is higher.

Key takeaway: A thorough cookie policy isn't optional compliance work, it's the foundation of user trust and the first line of defense against regulatory action.

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Consumer-protection checks in Terms Doctor

Step 1: Conduct a complete cookie audit

Before you can write or review an accurate cookie policy, you need to know what cookies actually exist on your site. Most teams skip this step and rely on outdated documentation or vendor contracts, which is why cookie policies often contain errors.

What to audit

First-party cookies (set by your domain):
  • Session tokens and login identifiers
  • CSRF protection tokens
  • User preferences (language, theme, accessibility settings)
  • Shopping cart or vendor comparison data
  • Custom analytics or performance monitoring cookies
Third-party cookies (set by external vendors via their scripts):
  • Google Analytics, Hotjar, or other analytics services
  • Advertising pixels (Google Ads, Facebook, LinkedIn, TikTok)
  • Payment processor cookies
  • Customer support widget cookies
  • Marketing automation cookies (HubSpot, Marketo, Mailchimp)
  • A/B testing or personalization engine cookies
Advertising and behavioral tracking cookies:
  • Retargeting or remarketing cookies
  • Interest-based advertising cookies
  • Cross-domain tracking cookies

How to audit your site

Use one or more of these methods:

  1. Browser DevTools: Open your site in Chrome or Firefox, go to DevTools > Application > Cookies, and record every cookie for each domain you visit during a typical user journey (signup, browse vendors, make a purchase, revisit the site the next day). Note the cookie name, domain, path, expiration date, and whether it's secure/HttpOnly.
  1. Automated cookie scanning tools: Tools like Cookiebot, OneTrust, or Secure Privacy crawl your site and categorize cookies automatically. These are faster than manual audits but still require human verification.
  1. Vendor documentation: Contact every third-party vendor and request their cookie disclosure. Stripe, Shopify, Google, Facebook, and most reputable vendors publish this information.
  1. Script tag audit: Go through your site's HTML source code (or your CMS template) and list every