Article 662 of the French General Tax Code
Subject to special provisions, the following are liable to registration duties: 1° When they do not give rise to the merged formality, the deeds referred to in 1 of article 635 ; 2° The acts referred to in 1°, 5°, 7° and 7° bis of 2 of article 635 and in article 636 and generally all deeds voluntarily submitted to the formality of registration; 3° Transfers resulting from oral agreements…