The documents requested vary depending on the situation of the tenant or the guarantor. The mandatory documents relate to identity, proof of activity, proof of address as well as proof of income that may be requested by the lessor. The RIB is part of the constituent parts of the file by the donor organizations, which make payments via direct debit authorizations. This means of payment of the rent requires having the bank details of the tenant or the guarantor. So, although this part is not mandatory, it will be requested very often.