[ULPIANUS libro quinquagesimo ad edictum. ] §29.3.4.prCum ab initio aperiendae sint tabulae, praetoris id officium est, ut cogat signatores conuenire et sigilla sua recognoscere
[ULPIAN, book 50 on the edict] When the tablets are to be opened at the very beginning, it is the duty of the praetor to compel the signers to assemble and recognize their own seals.