How do you duplicate Items in the game?Or is this a hoax?

I've never heard of being able to do that. Only game I've ever know being able to duplicate things in was the Pokemon games, and even in those it was extremely difficult.

It's also big in the Diablo games. But yes, you can dupe items in RE 1 REmake at least. I can't remember how but it has something to do with the item boxes. I did it for grenade launcher ammo once just for fun. Google it to find out how.

All i know was from upgrading all your weapons provides duplicates in the sale box that are higher spec...that's all that i have found so far.