A certificate of appreciation is a medium to deliver a message of gratitude and to recognize a person or organization for a contribution to a cause. As an expression of appreciation, its use is in informal, simple or formal situations.
The certificate delivers the message of gratitude and gives the recipient a tangible souvenir. The wording is straightforward and reflects how much the award winner means to the person or organization awarding the certificate.
Since it is usually put on display, it is short and only has the important information such as the name and title of the recipient and the reason for the award.