Build A Boat For Treasure doesn't give you a lot of information when codes don't work. This can make it difficult to understand if it's one you've already redeemed or simply an expired code.

All Working Codes for Build a Boat for Treasure in Roblox =D — Use code for 5 Gold =P — Use code for 5 Gold hi — Use code for 5 Gold Squid Army — Use code for 22x Ice and 22x Gold ...