PD U1 form (Confirmation of periods to be taken into account for unemployment benefits) is a
confirmation of employment abroad during which your employer paid unemployment insurance contributions on your behalf.
The form is issued by the foreign employment office after the employment termination and is submitted to the employment office in your home country or the country where you are claiming unemployment benefits.
You will need to present this document when you return from abroad to your home country or another EU country to claim unemployment benefits.