Spain NAF / SS Generator
Spanish Social Security Affiliation Number (NAF) of 12 digits.
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About the Spain NAF / SS
The NAF is the unique 12-digit number assigned to workers registered in the Spanish Social Security system. It is mandatory for employment in Spain.
This tool generates and validates NAF codes, verifying the last 2 check digits applying the standard Modulo 97 algorithm on the first 10 digits.