CURP to NSS API — convert CURP to social security number
Question
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Answers
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In theory 1:1, but in practice duplicate NSS numbers exist for the same person from historical IMSS data issues. A good CURP to NSS API will flag when multiple records exist and return the primary one.
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Duplicates are a known IMSS data quality issue. If found, the employee typically needs to visit IMSS to consolidate records. Your app should handle this edge case gracefully.
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Looking for a CURP to NSS API for our employee onboarding system. The use case: new employee provides their CURP during registration, we call the API and get back their NSS, then auto-populate the NSS field. Avoids errors from manual entry.
Key question: is the CURP-to-NSS relationship always 1:1? Can a CURP have multiple NSS numbers (e.g., if someone registered in IMSS multiple times)?