A Search Engine Watch Forum thread named Yahoo's Overture System Auto-Charges Credit Cards Incorrectly describes a method of logic used to charge credit cards, that an agency account rep may argue with.
Basically, as described in the thread;
If the credit card under the Client account expires, Overture’s system will automatically go to the Agency account and use the first credit card listed in the Agency account regardless of if it is the credit card that belongs to that client or not. The change in credit card happens without any notification to either the customer or the agency.
The thread creator came up with a solution for this not to happen again. He said just to change the credit card of choice, in the pull down, to "Choose Credit Card".
Forum discussion at Search Engine Watch Forums.
