Hi Zanner,
I'm, thinking it is kind of a reach, going from a credit card info to going to court. To my knowledge while limited, this is not the type of investigation that LE put a lot of resources into. First they would need to get the crown to issue a warrent to appear, and based only on a credit card receipt, which doesn't even have your name on it, would be a tough sell, under the best of conditions. From what I know about credit cards, they are better than cash in a lot of ways, except if you are worried about personal issues, a spouse ect. Otherwise, I think you are good to go!
P.S. Don't believe everything the LE tell you, they dole out advise as if it is their perfect world, the reality, generally does not work like that. They paint the best senerio, from their point of view.
Just my 2 cents.