How far back does the court look at disposition of property?
The question is somewhat unclear - BUT - it can look back as far as necessary to settle or answer the legal question being asked.
My girlfriend is the head of her deceased parents estate her brother has signed over power of attorney to her is that enough to put the title of her parents house in her name?
His power of attorney doesn't have anything to do with the transaction. If the court agrees that is the appropriate disposition of the property, the executor can transfer title to the appropriate person. The court will look to see if the debts are paid off and that the brother is getting his fair share of the estate. Consult a legal profession in the state in question for a full understanding.
You are owed money from old roommate can you put a lien on the trailer that she owns that is still on your property?
Not without going to small claims court, and then going back to court after a time, and maybe again, etc. After all that they probably will have moved it sold it, whatever. Might be better just to demand that it be removed from your property, then, at least you won't have to look at it. They sound like squirrels (sp?) and they may just abandon it anyway.
Contact the attorney who is handling the estate and ask your question. If that doesn't help then visit the court where the probate was filed and ask to see the file. You can look through it to see what has been done so far. If there is a bequest in the will for you and the property has not been handed over then you can file a motion with the court to compel the executor…