A contract with a foreign client has to be registered with the National Bank once it passes 90,000 BYN (about $30,000) for a self-employed person or a private individual, or 180,000 BYN (about $61,000) for an IE — before performance starts, or within seven working days of the money landing. Your side of that paperwork is the contract, the invoice and a clear payment purpose. On the payer's side, sanctions screening and a working bank route decide whether the money arrives at all.