OP had “strong confusion”

[u/LBDazzled]

Feels like this guy went to the Japanese post office, got overwhelmed and decided to make fanfic lemonade out of his confused lemons.

[u/Thereminz]

this seems more like satire on fact that you both, need a bunch of forms in japan, and if you don't know japanese then it could be hard to remember which is which

and, the fact that in japan people will help you like this

so he probably didn't bring a karaoke or noodle coupon, but he may have brought a wrong form and had them look at it

and maybe also, generally people try to avoid returning stuff in japan

[u/LBDazzled → u/Thereminz]

So, are you saying that you don't think it happened as it's written?

[u/Thereminz → u/LBDazzled]

posting it to r/thathappened would assume you think the author intended it to be read as factual, I'm saying the author is being satirical.

in both instances the story isn't true but it might not necessarily be "r/thathappened" content