Yes, but where are the nuclear wessels?
Helping prove ownership:
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Deed
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Tax records
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Mortgage payment book
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Insurance documents listing you as the owner for that address
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Basically any other scrap of paperwork with the name and address involving spending money on the property
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Will bequeathing the house that has properly gone through probate.
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Failing all that, notarized declarations from reliable witnesses willing and able to appear in court and testify