A local council has introduced a text message service for residents who suspect their neighbourhood store of selling alcohol to under-18s.
The service invites residents of Grimsby and Cleethorpes to text "underage" and any information they have to 82055.
North East Lincolnshire Council's website tells residents: "Please tell us where underage people are buying alcohol, where they drink it, and when."
A Costcutter store in Ripon Street, Grimsby, was recently forced to close its off-licence section for three days after failing three test purchases.