Gave a loan out to someone to purchace a house they filed banckrupcy can I get money back

Unless there was a lien recorded against the property, you will probably not be able to get your money back.  You should do a lien search against the property.  Look on the internet for the public records office of the county in which the property is located, and look for the property.  All of the mortgages will be recorded.  If the document you made when you lent the money was properly recorded, then it will be there, and the loan will be enforceable.  If not, then you have no record that you lent the money.   It sounds like it was just a letter, or something like a promissory note, which is not tied to the property and not enforceable if the property is lost through foreclosure.  Good luck.