A few simple rules how to avoid problems and deception and rent an apartment in Moscow
Require documents for the apartment and carefully check them. It is not enough to check the passport with a residence permit, ask the owner to show documents for ownership, as well as a copy of the personal account and an extract from the house book. Sometimes it happens that other adult residents are spelled out in the apartment, then they must also agree to rent.
You can play it safe and include them in the lease, or notarize their consent with the delivery of housing. If this is not done, then you can be evicted from the apartment. Or this option: you are allowed to stay, but you will be hooked on you for a free neighbor who has a residence permit in this apartment. If you really talk to the owner of the apartment, then ask him to show the BTI certificate confirming the lack of collateral and arrest her so as not to get additional problems.