Yes I know you can put them on the MB, but here is what happened--

I was given rights to decorate our newly purchased FC house. It had a moogle exterior that I wanted to change, so I bought the requisite items (wall, roof, fence) but it would not let me change them. There were little "no" markers beside each item.

If I clicked it anyway, it said something like "unable to use that item".

I thought that this meant I had to purchase a new housing permit (for 3 million gil!) So I did, but couldn't use that either. It was only then that I realized permissions weren't quite right, so the admin gave me the correct ones to remodel.

I would've liked to sell that permit back to the housing sutler for what I put into it, since the game didn't really say "you don't have permission to change these items". It's really not clear on that point, and can lead to a lot of mistaken purchases like I made.

(I can make the gil back easily through crafting, but it seems like a UI oversight that isn't explained well enough)