My girlfriend is doing an Erasmus in Madrid, Spain, and she lives in a flat with some other roommates, none of whom has signed a tenancy agreement with the landlord (I know, not very wise...).
Today the landlord called them and announced them that they have to leave the place in 2 days. The problem is that the tenants have all given deposits, so most probably, if they don't leave the place immediately, they'll lose the deposits.
What would be the legal outcome in case they call the police? Is it possible that they have charges too because they haven't signed tenancy agreements?