Deduct rental expenses from rental property in parent's name?

[Ricky Stafford]

Hello friends -

I recently bought a home that I lived in for a bit and am now renting. The house was purchased about 6mo ago. I was unemployed at the time as I had quit my job since my other rental income exceeded what I made by working, so I had my mom sign for the next house because I still don't have enough rental history to qualify for obtaining my own mortgage. Of course, I paid the down payment, have already significantly paid down the principle, and obviously run all the operations for the rental. 

My question is - what are the legal implications to be aware of when deducting expenses related to this property such as mortgage interested, deprecation, etc? It's operated as a vacation rental if that makes a difference.

Any thoughts would be appreciated, thanks.