Possibly the "check inventory for item" function should consider translated bank notes, OR some items shouldn't be able to be noted
In OpenRSC, during a quest, if you have the noted version of an item in your inventory, the "check inventory for item" function doesn't detect it. This is probably an unintentional oversight, and while I can't think of too much of a consequence, it does allow the player to get more of an item than intended, and also it allows the user to keep an item when usually it would be taken away.
e.g. the "Broken shield" item from the Shield of Arrav quest, if you have the item in your inventory (and probably also it checks the bank, but I'm not 100% sure on this particular item... for some quest items it checks the bank and for some it doesn't), then the chest in the Phoenix hideout doesn't let you get another broken shield half.
if you withdraw all your "Broken shield"s as banknotes, it allows for the player to store them in a way that is not traditionally detectable, since the exact item ID isn't in your inventory, and the exact item ID isn't in your bank.
SO, in authentic RSC, you wouldn't be able to get more than probably 30 to 60 Broken shields, (assuming the chest does in fact check your bank as well as your inventory), but in OpenRSC, you could get, ... probably 2 billion of them! if a person lived long enough.
And also, e.g... in the Legend's Quest, maybe you could store holy water in golden bowl as a bank note, and stop it from being destroyed that way, (instead of doing the death-storage that is required in authentic RSC to skip Nezekchnid second stage)