If an agreement contains a term signifying that in the opinion of the parties section 10(3)(b)(iii) does not apply to the agreement, it shall be taken not to apply unless the contrary is proved.
It shall be assumed in any proceedings, unless the contrary is proved, that when a person initiated a transaction as mentioned in section 19(1)(c) he knew the principal agreement had been made, or contemplated that it might be made.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In proceedings brought by the creditor under a credit-token agreement—
In proceedings under section 50(1) in respect of a document received by a minor at any school or other educational establishment for minors, it is for the person sending it to him at that establishment to prove that he did not know or suspect it to be such an establishment.
In proceedings under section 119(1) it is for the pawnee to prove that he had reasonable cause to refuse to allow the pawn to be redeemed.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .