The teenager's body was found after she disappeared from a holiday resort where her family where staying.
The family of Nora Quoirin have confirmed a body found in Malaysia is their 15-year-old daughter, police say.
Libby Squire has been missing for more than a month.
The student went missing in the early hours of February 1.
Five hundred of the delivery app's riders will display posters on their bags as part of a campaign with charity Missing People.