error at step s 816 otherwise the title authorization system 14 selects the record in the title authorization service properties database 22 that is associated with the selected property if the status field of the selected record indicates that title to the selected property is unlocked at step s 818 the title authorization system 14 allows the trusted authority to modify title to the titleholder 39 s real estate property using the lts 18 the lts 18 then updates the all properties database 23 with the title change at step s 820 otherwise the title authorization system 14 notifies that the lts 18 should prohibit the trusted authority from modifying title to the titleholder 39 s real estate property if the title change is authorized after the trusted authority has completed the change in title the lts 18 commands the title authorization system 14 to remove from the authorizations database 25 the record that is associated with the selected real estate property at step s 822 if the title change comprises a sale of the real estate property the lts 18 also commands the title authorization system 14 to remove the real estate property from the title authorization service to do so the title authorization system 14 removes from the title authorization service properties database 22 the record that is associated with the selected real estate property otherwise if the title change does not comprise a sale of the real estate property e g an encumbrance the title authorization system 14 updates the status field of the record in the title authorization service properties database 22 to indicate that title to the selected property is locked again the title authorization system 14.