PESEL number (Polish personal identification number)

The Polish Ombudsman (RPO) describes PESEL as an 11-digit number that uniquely identifies a person. The first six digits are the date of birth (year, month, day), the next four are a serial number that also encodes sex, and the last is a check digit. The number is assigned by the minister responsible for digital affairs and is held in the national register.

Because the first six digits come from your date of birth, check that the date on your passport and on every form you submit match exactly. For foreigners there are two routes: the number is assigned automatically when you register your address, or on application when you cannot register.

It is used across Polish administration. The RPO notes, for example, that PESEL serves as the tax identifier for individuals who do not run a business and are not VAT-registered.

Most foreign doctors, nurses and midwives meet PESEL in their first weeks: employers, the tax office and the social insurance institution (ZUS) use it, and Polish online public services generally expect one. If an office tells you it needs your PESEL, gov.pl says it should also give you the legal basis for that requirement.

It is separate from your professional registration (the PWZ) and from your residence document (the karta pobytu).

1. Automatically, by registering your address. gov.pl says you obtain the PESEL ex officio when you register your residence (zameldowanie) for a stay of over 30 days.
2. By application, if you cannot register. Download and fill in the PESEL application form, or get it at the municipal office, and sign it by hand.
3. State the legal basis. The application must name the legal provision that requires you to have a PESEL, such as the rule an employer, ZUS or the tax office relies on.
4. Submit it in person at any municipal (gmina) office with an identity document. The official accepts it immediately and, if there are grounds, gives you a notice of the number.

gov.pl lists the service as free of charge. You collect the notice at the office where you applied, and in practice the number is issued on the spot once the application is accepted. If the application has gaps you are asked to fix them, and an office may not process an application that does not meet the formal requirements.

• No legal basis. The most common reason an application stalls is a missing legal basis. Ask your employer or the office that needs the number to name the provision in writing.
• Wrong order of steps. If you will register an address for more than 30 days anyway, it is simpler to wait and receive the number automatically.
• Applying online. The gov.pl foreigners' service asks applicants who cannot register to apply in person at a municipal office.
• Signing. Remember to sign the paper form by hand; an unsigned or incomplete form is sent back for correction.

See Poland for the professional route.