The client would swipe a credit card or ID card supplied by the clinic, which would bring up all the information about the client and their pet on the exam room computer. (tulsapetsmagazine.com)
Cancellation and no - show charges apply after this time and will be charged to the credit / debit card supplied at the time of booking. (themontcalm.com)
The difference is only in their branding because they probably all use the same card supplier to run their business. (captainaltcoin.com)