PIS/PASEP validation rules
A PIS/PASEP number has 11 digits: 10 form the account base and the 11th is a modulo-11 check digit computed over the first 10. Anyone writing a validator needs the exact weight table and the rounding rule, not just "it looks like a CPF".
A remainder of 2 falls under the general rule, so the check digit is 11 minus the remainder; verified by running the algorithm, the resulting 120.34567.89-9 is valid.
This is the boundary case: a remainder of 0 (just like remainder 1) forces the check digit to 0 instead of applying "11 minus the remainder", which would otherwise produce an invalid 11.
The display mask groups the 11 digits into blocks of 3, 5 and 2, with the check digit always isolated after the dash to stay visually separated from the base.
They appear in different contexts, but many systems use the same 11-digit structure with a check digit.
No. The CPF uses descending weights from 10 to 2 (then 11 to 2 for the second digit); the PIS/PASEP uses the fixed sequence 3, 2, 9, 8, 7, 6, 5, 4, 3, 2, which climbs to 9 on the third digit before descending, and it has no second check digit recomputed over the first.
Because "11 minus the remainder" only works for remainders from 2 to 10; applied to a remainder of 1 it would yield check digit 10, which does not fit a single digit, so the rule intercepts remainders 0 and 1 before subtracting and pins the check digit to 0 for both.
The modulo-11 algorithm alone does not reject repeated sequences, the same way CPF validation does not either on its own; if your validator needs to block those cases, that is an extra business rule layered on top of the check-digit calculation, not part of it.
Just confirm they are exactly 10 numeric characters: the algorithm accepts any combination of 0 through 9 in each position, so format validation (length, digits only) should run first, and check-digit validation after, as two separate steps.
Generation happens locally in the browser. Analytics receives only action, status, type and format, never the generated PIS/PASEP.