Study on the consequences of linking the address data of the national provider of study loans (IBG) to the address data of the municipal registry office. In case two addresses of a student are not equal, the studyloan will be terminated. Since some lodging housekeepers, landlords or sublessors prefer anonymity to the authorities (for reasons of taxes, fire safety, social security etc.), some students might get in trouble. Housing situation / satisfaction with housing situation / removals / actual registration of respondents address(es) and reason for different addresses / measures take by r.'s landlord in case of legal address registration / measures taken by r. in case legal address registration is necessary to receive study loan Background variables: basic characteristics/ residence/ housing situation/ income/capital assets/ education