Within 90 days of the sale, you must send a formal notice via certified mail to the owner of record and any substantial lienholders (like mortgage banks), informing them of the sale and their right to redeem. Failure to send this notice within the legal timeframe voids your purchase.
You cannot legally enter or manage the property during the redemption period; doing so is trespassing.
Property address search with current owner name and delinquent amount.