If you have them, bring the property address, parcel number, latest property-tax bill or delinquency notice, lien or mortgage statement, creditor or court case number, deed, and any tax-sale or foreclosure notice. Start with what you know; you can call before you have everything.
The tax office or creditor named on the account confirms its current balance and payoff instructions. A Register of Deeds office provides recorded land documents; the title company reviews ownership and recorded claims for the transaction.