Police were called to sheltered housing in Crawley after a purse was stolen from a kitchen.
The theft was reported by a warden at Dyers Almshouses, Northgate Road, and took place on Tuesday February 10.
A spokesman for Sussex Police said the resident had left the door to her flat unlocked while she visited the communal area.
When she returned, the purse had been taken from her kitchen.
Witnesses or anyone with information are asked to contact Sussex Police on 101 quoting serial number 0630 of 10/02.