Stealing music from others was easy using the "Foison technique", the common procedure executed several times by Tristan Foison. The "Foison technique" contains two significant features:
The result of the "Foison technique" produces a title page that cries "fraud" but curiously raised no suspicion for all the years. Here a few examples (the plate numbers did not appear on these first pages but on the following pages).
Pierre Sancan: Piano concerto (on the left) and Tristan Foison: Piano concerto (on the right)
Raymond Gallois-Montbrun: Les sept peches capitaux (on the left) and Tristan Foison: Seven Melodies (on the right)