This medal can only be recieved once.
Put up 25 turf posters that advertises Turf. The poster needs to be in A4-size or larger to be counted for the medal.
Take pictures of the Turf posters you have posted. Put the picturers i a folder on some sort of cloud storage (Google Drive or Dropbox for example) and share the folder. Make a [issues.turfgame.com turf issue] under "Medal claims & Missing medals". Remember to include the link to your shared folder with the pictures of the turf posters.