The thief was spotted putting his hand inside the post box in Cricketers Parade in Broadwater Street West on Monday between 2.30pm and 2.45pm. The box was nearly full and he took out a wad of letters and Christmas cards before opening them and looking for money.
He then went off and then returned at 3pm and took some more.
PC Roisin Vafaee said: “Did anyone see this man doing this or do you know who he is? With the last Christmas posting dates coming up please be aware of post boxes being full, don’t put your post in there if they are.”
Anyone with information should contact police on 101 or email [email protected] serial 0782 of 16/12.