Prosper is unable to send checks. All Prosper transfers are done electronically through the website using the free Automated Clearing House (ACH) transfer system. We can transfer your available cash back to the bank account on file for you if the bank account is still open and active. If you need to add a new bank account, please submit a copy of your bank statement or a copy of a voided check to Prosper at firstname.lastname@example.org. In order to close your account, you must transfer all the remaining cash from your Prosper account to your bank account.