Hoover Web Design and Tidy Form both maintain free templates of certificates of participation and other documents. These samples are simple given that certificates of participation exist solely to show that an undersigned party participated in a program or course.
Many templates feature celebratory graphic designs which serve to highlight the accomplishment of participation. Apart from these designs, the templates include a space for the participant's name and another for the signatory party's witnesses.
Both Hoover Web Design and Tidy Form let users download their templates for their own use. They can then print the forms, modify them themselves and store them for later use.