I don't know what "accident" (or even "incident") you're talking about. What happens is: the guard looks at the bottle, asks if I have a prescription. I show the (fake) paper, they look at it, nod and let me go. No record is ever made of this.

Most of the time, the guard doesn't even speak the language; I'm not sure they're even trying to read it, they're just ticking a box in their mind that says "there was a paper".

My guess is, it would work with any paper; I may try that some day (show a completely unrelated prescription, or something that isn't even a prescription).

most countries don't track incidents like these and they're treated on a case by case basis. i've only ever had exceptions on flights to the US treated with an overbearing amount of discretion. basically- feel free to use this method of "forgery" anywhere in the asias or the middle east or europe(apart from the g5) or south america. only japan and america could pose issues

So in order to use this "simple trick" you have to study law and law enforcement policies of each country.

Why not get real prescription, or split large bottle into smaller bottles?

they will stop you just the same if you have multiple smaller bottles(personal experience with energy shots) and get a prescription for a non-prescriptive medicine is basically asking a doctor to commit fraud for you non? what is the difference? vague ethical conundrums like this are not worth considering imo

also doesn't everyone study law enforcement policies before visiting a country? i know i never have anything with poppy seeds on me or eat any before travelling as a rule because of mild meanderings into research on chemical detectors and drug enforcement policies in the middle east

I get prescriptions for over the counter stuff all the time. Insurance covers it this way.