eCheck is a popular deposit method for online betting platforms like BetOnline. It works similarly to a traditional paper check, only it is electronic and processed much faster. To deposit using eCheck on BetOnline, you'll need to provide your bank account and routing number, and the amount you wish to deposit. The funds are then transferred directly from your bank account to your BetOnline account. Just like a paper check, eCheck transactions are traceable, making them a secure option for online betting.