You can be as condescending as you want in your replies to me and the others on this thread whom you deem to be so lacking in personal responsibility for our respective finances, but if you took a break from scolding us, you may realize that you have no one to blame but yourself.

Your original post says this happened to you "a couple of times" at "bars and restaurants in JC", and that "after the first time", you started taking photos.

Your ever-so-clever reply above, however, contradicts that. It seems to say, as best as my commoner brain can understand, that you never got a copy of the restaurant receipt the first time and 'the most recent incident" happened to your friend, not you (although you indicate you are waiting with baited breath for your credit card transaction email to come so you can find out if you have fallen victim to this nefarious, city-wide conspiracy for a second time).

So, you can't be sure you didn't mistakenly add $2 more on the receipt you left at the establishment the first time and you are unclear as to whether your friend has photographic (and thus "irrefutable") proof of the second incident that happened, as far as you are saying, only to her.

Ultimately, you lack not only irrefutable proof of these alleged multiple incidents, but any proof whatsoever of even one, let alone multiple, incidents.

Your TLDR would have been more accurate had it said: "One time a few weeks ago, I was at a bar and they charged my card $2 more in tips than I remember leaving, but I can't be sure so now I photograph both copies of the signed receipt so if it ever happens to me again, and I don't think the monetary amount is too small to make it worth my while to take action, I might do something about it."