The charity is compiling a shortlist of agencies, with pitches due to be held at the end of this month. Tangible Response, the incumbent on the account, will repitch.
It's thought that the charity is looking for an agency to help broaden its audience base, specifically targeting a younger audience.
Tangible Response has worked with the Royal British Legion for 11 years. It successfully retained the business in 2003, following a pitch against undisclosed agencies.