In the supply room
If your talking about Counterfeit Island then you get the key and go back to the museum on Counterfeit Island
Once you get the key from the curator, go back to Counterfeit island and use it at the Inspector's house.
There is no key. Go upstairs to find the painting.
You go to the inspector's house - the key unlocks the door.
if you want keycard then go to poptropicahelp.net and do island guide
u get it somewhere on the island idk where if i did i would go there
First go to skullduggery island,take your ship to a island called Keys World island and you will find the key of the chest on counterfeit island!;)
you go to early poptropica, and go inside the gray art place. there you talk to the lady in purple and get a key. the key goes to the locked house back in counterfeit island.
The big house on the country side.
The key is not on counterfeit island. Go into the mueseum and the person on the left will give you a package. then go to early poptropica and there will be a lady standing on the left.
go farther in the island until u get a key (ps the key goes in the door)
You go to Early Poptropica Island and go into Pop Art Museum and a lady gives you a key