Since she would basically be 'gifting' the 48k to you, she may also be on the hook for gift tax (disclaimer - not an accountant so I have no clue, just putting it out there) which then creates a paper trail and gives her a stronger case that she has an interest in the property.  

Joel Owens wow... what a nice, early mother's day gift.

It's called a deed of gift.

The only issues that we ran into were that FHA has its own inspection process and we had to do a couple of repairs before the loan would go through and because it was a triplex we weren't allowed to accept gift money.

For a $100K gift, most likely there won't be a gift tax unless the parents have already made lifetime gifts is excess of $11.18 million. 

The ex-tenant will have to pay the legal fees added to their judgement, you will have a judgement that last for 20 years (I think of it as the parting gift to the tenant that keeps on giving).

If they won't be able to stay, I wouldn't bother with any gift ...

When everyone is buying gifts I prefer to buys houses!!

Last week they did a top ten on cars for singles moms, next week they will do a top ten for valentines day gifts, so on and so forth.

They refer to this mortgage as a Delayed Mortgage or Delayed FinancingIn order to qualify for Delayed FinancingThe cash used for the original purchase must be documented to the bank (no gifts for the original purchase-- if it is a gift the situation then becomes a lot more difficult)The new loan size may not exceed the property's original purchase price + closing costs (re-read my originally example)A title search must show that no liens exist on the homeProof that the home was actually sold (HUD-1 document from closing will do this)Let me know if you have any other questions.