wadeatatomic - 11:03 pm on Nov 21, 2011 (gmt 0)
If your client is planning on carrying out transactions based on this stored data, it may actually be a violation of the terms of his own merchant bank account. Is storing the numbers really worth losing the ability to get money from those accounts?
Most major merchant processors offer repeat billing tools that securely store the client's bank account # for you. Sure, they cost money, but the benefit is that you actually get to use them.