Ok, as the party pour over the document, the Fighter and the Rogue both spot the following term:
''Notwithstanding the operation of the formative part and without limiting any other remedy available, the parties agree that in the event of attempted repudiation, non performance by the promisor, egress from the current plane, denial of consideration or breach of any essential term by the promisor, the contract shall instead function as a pact primeval with the forfeiture of the promisors immortal soul, with collection to occur forthwith''
Translated, it means that should the person signing go back on their word, their soul is forfeit.