Lambeth residents can now praise the police via social networking website Facebook.
The Commend a Copper group has been launched by London Assembly member Brian Coleman.
Residents can join the group and leave messages of praise for police.
It is important for the police to see they have public support for the work they do, he said.
• Is this a good idea? Leave your comment below.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here