I think that was why Donald Knuth stopped issuing checks for rewards for people finding errors in his books -- people would post images of the checks online to brag about having received them, and then criminals would initiate fraudulent ACH transfers.

Also not sure why that's not more common in comparison to credit card fraud.

Edit: I guess credit card fraud can be easier to cash out (for physical goods or services), while ACH fraud requires mules to act as intermediaries to receive the fraudulent deposits, which might be harder to come by and sustain.