There is a $30 fee for any bank deposit reversal. You can avoid these fees by confirming you have sufficient funds in your external bank account and no pending transactions that would reduce the amount in your external bank account before making a deposit request. You can also confirm with your external bank account that you are permitted to connect the specific bank account with Frec. Some external banks have restrictions on certain accounts and it's important you find out what those restrictions are prior to connecting your external bank account.
Multiple reversal fees can cause Frec to place a restriction on your account or close your account.