As a result, a tax sale purchaser may receive better title than an ordinary buyer, who takes title subject to any earlier recorded liens or deeds. However, in your case these abatement fees may be considered a special assessment and therefore a liability of the land that must be paid.
Be sure to contact an attorney quickly to ascertain whether these fees fall under your umbrella of responsibility and also be sure to resolve or extinguish this outstanding debt before any subsequent foreclosure actions are called upon you.
Good luck to you. Keep me posted if you can. I very curious about the outcome and how these abatement charges will be categorized.