They offer a one time online number that will never be used again., Recently after some very informative shoppers complaints, I called to be sure that my issued one time safe shop number could be used only once. This is NOT the case.
The company you deal with can use this number as often as THEY like. I canceled my credit card number and had to have one reissued. Not only did this I had to rearrange every payment taken from my card.
It not worth all of the trouble. Please, please, do not use safe shop with this bank.