A lien is a legal claim that can affect a property or the money due at closing. A payoff is the current amount and instructions from a creditor or tax office to satisfy an obligation. An older bill or notice may not show today's figure, so ask the office or creditor named on it to confirm the current amount and instructions.
When you sell to us, we pay the closing costs. Your liens are paid off from the sale at closing. The closing costs we pay are separate from your mortgage balance, liens, back taxes, and your share of current property taxes. The title company checks ownership and recorded claims, while the creditor or tax office confirms the current payoff information for the sale.
You don't need to pay off your back taxes before we settle. We buy houses with back taxes and liens — payoffs get handled through the closing, not by you upfront.