Limited Power of Attorney. Usually you need to sign documents to finalize the loan and get the car registered. That requires the person on the loan and registration. A limited Power of Attorney gives you permission to sign those 2 legal documents but nothing else. ie you can't go sell their house etc like a traditional full POA. Again talk to SA but I would bet it's an issue.what’s a limited poa? The reservation is under my name/account. Just the financing and registration will be under their name. Weird if they give an issue about that as long as they receive the $