What kind of documents can I provide to prove my address?

As a proof of address, you can upload a photo/scan of one of the following documents:

Notes on registration in the national passport (mandatory for citizens of the Republic of Belarus, the Russian Federation and Ukraine, if a national passport was provided for personal identification)
Bank credit/debit card statements
Utility bills (except for bills for mobile communications and the Internet)
Notarized documents, for example, confirming the purchase of real estate
Lease of residential premises