Deliveroo riders in Bristol will display missing person posters on their backpacks as part of a campaign to find them in time for Christmas.
Around five hundred riders across the country will display the posters as part of a campaign with the charity Missing People.
The food delivery app will also introduce a fundraising feature called Ride to Find, which will give customers the opportunity to donate to the charity via the app.
Deliveroo's chief executive Will Shu said his company simply "wanted to help."
"Our riders are at the heart of our business and are seen by communities up and down the country as they travel our streets to deliver food, so it's amazing that our network of riders have volunteered to use our recognisable backpacks to create mobile billboards in support of such an important cause.
"We hope that over the holidays, our Ride to Find campaign will help bring missing people home to their friends and family as well as raise awareness and funds for the Missing People charity," he added.