A letter of authenticity should include the title and dimensions of the piece, the number of proofs, the year created and the artist's signature. These letters often accompany pieces of original artwork.
When writing a letter of authenticity, the value of a piece often heavily relies on the details provided.
Step 1: List the specifications about the piece
Indicate the name of the piece and the year it was created. The size of the unmounted painting as well as the medium, such as oil or acrylic, should be listed as well. If it is part of a limited edition, the edition number is part of this section also.
Step 2: Provide a statement of authenticity
This section is a statement from the artist confirming the piece is created by him or her. It also states that all copyrights and reproduction rights are retained by the artist, and the piece cannot be duplicated without his or her consent. The statement covers legalities that may stem from unlawful reproduction of the piece.
Step 3: Sign and date the statement
A letter of authenticity is not valid unless it is signed and dated by the artist. A stamped signature will not suffice. He or she can also include contact information such as a current address or email.