GN 01752.315 Republic of Poland I.D. Number
The following identifying numbers will be used when communicating with SSA in connection with individual insured persons. The insured person may have any of the following numbers:
PESEL – 11 digit number issued by the Polish system which consist of the following, YY/MM/DD (date of birth) along with gender description and sequence number.
NIP – Tax payer identification number.
ID Card Number