I wonder if companies want to have an image of a cashed, endorsed check as proof that the funds were sent, given the antagonistic nature of the relationship. With ACH/wire you can prove that the money was sent, but it is harder to prove that it landed in the customer’s account. Kind of a TCP vs. UDP thing.
This is probably partially right. Although it might sound silly to this crowd, the idea of asking people to get ACH and acct number is full of opportunities for things to go wrong (wrong info, typo in info, etc). Sending a check is the good ole fashioned way that everyone understands.
