Missing UTM Parameters: Why Partner Revenue Disappears

Short answer: When UTM or affiliate tracking parameters are stripped during redirects, the partner network can't attribute the sale to you — and you don't earn a commission. This is one of the most common and hardest-to-detect causes of affiliate revenue loss.

How Tracking Parameters Get Lost

• Redirect chain stripping: Some redirect hops drop query parameters, especially when switching between HTTP and HTTPS or between domains.
• Partner platform changes: The partner updates their tracking system and existing links lose their parameter format.
• CMS or plugin updates: URL rewriting rules in your CMS may strip or modify query parameters.
• Link shorteners: Shorteners like bit.ly and t.co forward whatever URL they were given, parameters included — the real risk is shortening a URL that never had the tracking parameters attached in the first place.
• Caching layers: CDN or caching configurations may serve cached versions without dynamic parameters.

How to Detect Missing Parameters

1. Follow the full redirect chain for each affiliate link and compare the parameters at each hop
2. Check the final destination URL — does it contain your affiliate ID, sub-ID, and UTM tags?
3. Use automated monitoring that verifies parameter integrity on every check
4. Compare attribution reports — a sudden drop in attributed conversions without a traffic change often signals a tracking issue

How to Fix It

• Replace the link with a fresh tracking URL from your affiliate network
• Remove unnecessary redirects in the chain
• Test the link end-to-end after any CMS or plugin update
• Set up continuous monitoring to catch the issue if it recurs

Related: Affiliate Link Checker Guide · Error Code Guide