Hmmm that's right guys I didn't think before oh well
I ordered 1000 cards I can't return them... But I could say to have a stamp u need to spend over 20? Like blowdry is 17 only so that wouldn't count only over 20 pounds then I'd sign it errr (())((
Or you could print off some t's & c's for your loyalty scheme (& make sure you note them on your website / Fb etc) - although it would mean you would have to hand them out yourself rather than via a third party. Just an idea....