Where a condominium unit purchased at a foreclosure sale has a lien from unpaid presale common expenses, the purchaser extinguishes the lien whenever he pays off all post-sale common expenses and is not required by Section 9(g)(3) of the Condominium Property Act to do so within a month in order to extinguish the lien.The 1st District Appellate Court reversed and remanded a decision by Cook County Associate Judge Martin Paul Moltz.In 2011, Thomas and Marilyn Hoffman went into default on a mortgage encumbering their …