Does anyone know how authorities can check your absence periods in the country?

My girlfriend is a non-EU citizen and she has been in her country (russia for some months).

What proof of evidence do you need to provide? She got ride of her old Passport. How she can proof now her absence?

Hello, Does anyone know how authorities can check your absence periods in the country? My girlfriend is a non-EU citizen and wants to apply for the long term EU residence permit. She has been in her country (russia for some months). What proof of evidence do you need to provide? She got ride of her ...

Hello, My girlfireind is a non-EU citizen living in Austria for 9 years as student and who wants to apply for a long term EU resident permit. As a student she needs to be legally registered in Austria for 10 years, meaning it only needs one year more to obtain that permit. Me, I'm an EU citizen work...