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Knowledge Base & Operational Documentation How to Prevent API Integrations From Accepting Duplicate Customer Records
11/11/2026
Concurrent requests and retries can create duplicates when the destination lacks an idempotency key or unique matching rule.
Checks to make
Use a stable external identifier, enforce uniqueness at the destination, and make create operations idempotent. Test concurrent and retried requests, and route ambiguous matches to review rather than merging records automatically.
When to get help
API engineering can add idempotency and duplicate detection. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.