TIN verification online

SSN: 9 digits (XXX-XX-XXXX), EIN: 9 digits (XX-XXXXXXX)

11 digits (XX XXX XXX XXX); official rules include a mod-11 check digit

UTR: 10 digits, NINO: 2 letters + 6 digits + 1 letter (e.g. AB 12 34 56 C)

10 characters (AAAAA9999A): 5 letters + 4 digits + 1 letter

Format varies by entity type. See OECD guidelines for details.

Format varies by entity type. See OECD guidelines for details.

Format varies by entity type. See OECD guidelines for details.

Private: cédula-based NIT with DIAN check digit. Entity: 9 digits (800–999M) plus check digit.

Format varies by entity type. See OECD guidelines for details.

Format varies by entity type. See OECD guidelines for details.

13 digits

SIN: 9 digits (XXX XXX XXX), BN: 9 digits + 2 letter program identifier