Handwritten words, phrases or numbers are commonly found on the back of paintings or on labels and stickers glued behind them. Forensic studies make it possible to date handwriting and to determine from which part of the world it comes. Likewise, old addresses and phone numbers found on labels can be dated.

When longer texts are revealed, linguistic analysis makes it possible to determine if the writer was a native speaker.

Furthermore, different types of boards used by painters, as well as writing instruments utilized can be identified and dated. How stretcher bars are cut and joined can be dated, and the country they came from can be identified. Tacks used to stretch canvas can be dated based on how they were manufactured. Sometimes their distinctive design makes it possible to pinpoint the country they came from.

Studies of elements within the composition make it possible to determine where a landscape was painted based on the trees and plants it shows. Breeds of farm animals and pets can be identified, dated and their geographical location determined. Moreover, the rigging of ships tells us their location or origin.

Forensic studies provide an endless supply of information that helps us to determine or confirm artwork authenticity.