Is a credit card number really valid for a deposit on a service?

I own a small business which often takes credit card numbers over the phone as a deposit. We recently had a customer no show, and she contested through her credit card company when we charged her (she claims it wasn’t explained when she gave us her #). The credit card company took her [...]

Where can I find credit card or cash operated computers?

I am looking for the computers you see in hotels or airports that charge users by the hour or whatever by inserting cash or a credit card. thanks.
I am looking to purchase these types of machines. Thanks.