I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
To determine who bought the house and who is the present legal owner, you will need to check with the local county land records office and the new deed will identify who owns the property now. If it was bought by an investor, then they may well be willing to rent it out to you.
If the house recently sold, and you are still living in it, you can wait until you are contacted by the new owner or their attorney about needing to move out and you can make your offer to rent at that time. If the lawyer for the other side took your number down, it is possible that the re-sale of the property has not yet taken place if the bank took control of the property following the foreclosure sale. Either way, the present deed on file in the property records office will tell you who the real present owner is. It is possible that no one has filed the new deed yet which means that you still own the property as far as the state is concerned. It can sometimes take a month or several before the new deed is actually filed---even after a foreclosure sale--- and until then, the county and state still deem you to be the owner.
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I wish you and yours the best in 2016,