Yeah, better clarify with 'C' asap because if it's a scam, it will land you in hot soup since the account involved is yours. I'm most uncomfortable when a transaction involves a few persons, like 'A' asking 'B' to bank in because for example, 'A' claims that he doesn't have a Maybank account so he asked 'B' to bank in for him (not a good excuse really since Maybank or any other banks have a cash deposit machine) or it could be more complicated like asking you to send to 'C'. Sometimes as a seller, I have to do double work to check whether 'B' is really aware that the transfer was made on behalf of 'A' but if I couldn't verify this, I'll rather stop the deal immediately to avoid unnecessary complications later on.