[DragonicRek]

Then consider yourself lucky.
Your method is incorrect, because Amazon has a system in which they bill customers if they don't return an item within a certain timespan

Yeh probably a lot of luck involved, but its happened to me a few times! I wouldnt recommend it as a repeatable method, but maybe if you are genuinely planning on returning something just hold on to it for a while and see if they actually request it back. They should send a reminder before rebilling you, if not then it probably slipped through the cracks. It might be because they did it in an unofficial way as a one off so it doesnt get flagged up on their system.

Interesting.
I'll keep this in mind.
Thanks!