TL;DR: Stripe Webhooks Duplicate Records Fix — most cases trace to a config mismatch, a hidden assumption, or a step skipped during setup. The fix path below covers the high-percentage causes first. If you're still stuck after 10 minutes, text PJ — most issues answered in one reply. 858-461-8054.
Operator Problem Guide
Stripe Webhooks Duplicate Records Fix
Stripe webhook duplicate records in 2026 are almost always caused by Stripe retrying a webhook after your endpoint successfully processed it but returned a non-2xx response (or timed out). Stripe does not know the processing succeeded — so it retries, and your handler runs the same logic again, creating a duplicate record.
Why This Happens
Configuration gaps between tools or services
Missing integrations or manual workarounds that weren't designed to scale
Changes in vendor behavior, pricing, or API that weren't communicated clearly
What To Check First
Verify your current setup matches the vendor's latest documentation
Look for recent changes — platform updates, new team members, configuration drift
Check if the problem is consistent or intermittent (different root causes, different fixes)
When To Escalate
The problem is costing you money or customers per week
You've spent more than 2 hours on it without progress
A vendor quoted you more than $500 and you're not sure if it's necessary
Dealing with this right now?
The fix is idempotency at the event level: before any processing, check if you have already handled this event ID. Store the event ID in a database table with a unique constraint. If the insert fails (key already exists), return 200 immediately without processing. This prevents all duplicate-processing scenarios regardless of the retry reason. Also ensure your webhook handler returns 200 before doing any heavy processing — move the actual work to a background job, return 200 to Stripe immediately, then process async.
