Pensioners and shoppers concerned about being mugged after withdrawing cash from the bank are being offered a police escort home in a district of east London, officers said.
Posters displayed near banks and post offices explain residents can call up and arrange for a uniformed officer to see them safely home. The officer will follow at a "safe distance" to avoid drawing attention to themselves.
"There have been incidents in the area in which elderly people have been targeted after withdrawing cash and this initiative, which has been running for the past five months, is an extension of the team's normal duties," police said.
A spokeswoman for Wansted and Snaresbrook police in east London said the service was only available to people who could walk home, saying officers would not accompany car drivers home.