from google- For instance, creditors and the IRS can take priori

For instance, creditors and the IRS can take priority over tax lien holders in cases where the original owner of the property declares bankruptcy.

http://www.esfcapitalmatch.com/e-s-f-univeristy/tax-lien-investment

not sure if that's correct. btw, did you buy yours at an auction as an individual?