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Knowledge Base & Operational DocumentationHow to Troubleshoot an API Integration That Uses the Wrong Customer Identifier
An integration may send a contact ID where the receiving system expects an account ID, or use an identifier that changed during a merge. The request can succeed but attach data to the wrong customer.
What to check
Compare identifier definitions, source and destination schemas, merge history, mapping code, and sample records. Trace a known customer through the full request and verify the destination association.
Recommended next step
Use stable documented keys, validate identity mappings before writes, and add reconciliation checks for mismatched ownership. Correct affected records through an auditable business process.
How Informatix Systems can help
Informatix Systems provides custom software and API integration services. We can review the affected setup, narrow down likely causes, and help plan a practical fix. Contact us with the platform involved, when the issue began, and non-sensitive error details.