I have prepared a button for use and integrated this with my site. On attempting to pay by credit card (which is what most users will do) the credit card returns the following message for every card. "We're sorry but we weren't able to add this card. Please check all the details are correct and try again. Or try a different card"
Is there a minimum transaction value causing this? My test transaction is for 1p. If so what is the amount I should use? Is there anything else of which I need to be aware to make this work correctly?
