Some general recommendations:
1) they usually offer cheap and central apartments, send you fake
photos (of existing addresses) and ask you to contact them via
messenger or chats. Very often they also use stolen IDs. Then they
ask you to send your personal data and a deposit.
2) Never contact them on messenger or chats. It is very easy for
them to send you spywares or malawares by this mean and steal your
3) If you are in doubt, you should ask them (via mail) to visit the
location, or claim that a colleague is ready to do it for you. They will
then invent excuses and say that they are momentarily out for work;
but that they can send you a signed contract (they do it!). They
also ask to send it back with your data and a deposit and blablabla.