People should ignore signs telling them that it is legal to urinate in certain public places in Nottingham, the city council said.
The signs, which were put up by pranksters in and around Nottingham, are designed to look official.
They feature a toilet sign and include the words: "Public Urination Permitted After 7.30pm".
Nottingham City Council is now urging the public to ignore the notices as it sets about removing them.
The prank also featured a laminated note, headed with the logo of Nottingham City Council.