How to Identify an Artist's Signature on a Painting
An artist's signature is the fastest route from “old painting” to a name, a market record, and a value. But signatures are often tiny, stylized, worn, or hidden. Here is how to find them, read them, and turn them into an identification.
Where to look
- Front, lower corners — the classic position, sometimes worked into the composition or hidden in shadow. Rake a flashlight across the surface at a low angle to reveal incised or impasto signatures.
- The back of the canvas — many artists signed, titled, and dated works on the reverse.
- Stretcher bars and frame — inscriptions, gallery labels, exhibition stickers, and auction lot numbers all carry attribution clues.
- Under the frame edge — rebates often cover the outermost centimeter of the painting, signature included.
Reading an illegible signature
Photograph the signature close-up in raking light and enlarge it on a screen. Work out which letters are certain and which are guesses — a first initial plus a probable surname beginning is often enough to search on. Note whether it's a full name, initials, or a monogram (interlocked letters, common with 19th- and early 20th-century painters), and whether there is a date beside it: the date narrows candidates dramatically.
From name to artist
Once you have a candidate reading, check it against artist dictionaries and auction databases: does an artist by that name exist, did they work in the right period and style, and do their documented works resemble yours? Be wary of wishful matching — a signature reading “Monet” is far more likely to be a later admirer, a copyist, or a different painter of the same name than the Impressionist master.
Let AI read it for you
ArtVal analyzes the signature and the painting together — style, technique, palette, subject, and mark — which is far more reliable than matching a name alone. Photograph the work, and the app proposes the likely artist, explains the reasoning, and grounds the attribution in comparable works. See how an identification is presented in the sample appraisal report.
Signature found — what next?
An identified artist is the key that unlocks the market record. The next step is valuation: find out what your painting is worth using comparable auction sales. And remember: a signature supports an attribution but doesn't prove it — for high-value works, authentication by a specialist or the artist's catalogue raisonné committee is the standard.