Apparently people on SSI don't have full rights like other citizens. What a shame.
Full rights? Full rights to what? The IRS doesn't send her a check every month do they? SSA does. SSA doesn't send you a check every month, so you also don't have full rights? The IRS has rules about gifts. SSI has rules about gifts. The IRS collects income taxes. Does your sister pay income taxes? So the IRS and SSA are both the government. So what? They have different rules. Again, you don't get a check each month from SSA, but your sister does. SSI rules apply to her if she accepts the money. She is not required to accept the SSI money. You could support her and then all of your rules apply.
You could call her SSI a gift from the taxpayers.
You don't HAVE to commit fraud. You could sell her car. You could put an ad on Craigslist. Your nephew could man up and buy the car instead of taking away her asset for free when she is the low income SSI recipient who has almost no money. And if it is really only worth $300, regardless of book value, then that is what he can pay. Or she can donate it to a charity and get a write off on her income tax. Oh wait, she doesn't get to do that either since she doesn't pay income tax. Another lack of full rights?
Resource transfer rules were created so no one can give away thousands of dollars of money or property and then come ask for government assistance because they are now too poor. In reality, most SSA employees don't bother asking too many questions about buying and selling cars. The rules are there, but there really is not enough time for the staff to nitpick over this stuff. Usually. Lots of SSI recipients buy and sell cars and keep zero documentation.
And yes, I get that you are emotional about her and it is good she has you in her corner. That is a good thing. I also think SSI could use a simplification, but everyone wants an exception to a rule, so it becomes complicated really fast. I also think the $2000 resource limit is long overdue for an increase as well as the earned income exclusion. But, I am not in charge. Neither are you.
But yes, I've done this dance before with imaginary proofs.
How did I guess that correctly?
https://secure.ssa.gov/apps10/poms.nsf/lnx/0501130200
One car, any value, used for transportation excluded from resources. A Toyota or a Lexus. A Chevy or a BMW.
https://secure.ssa.gov/apps10/poms.nsf/lnx/0500815200
Conversion of a resource (non-countable to countable) is not income. This is done wrong sometimes. Print this page. Maybe she should buy your car for $1000. It is a good deal for her. What you do with your $1000 is up to you. Do you owe your nephew any money?