136. Filling in where creditor blind or incapable

The proxy of a creditor blind or incapable of writing may be accepted, if the creditor has attached his signature or mark thereto in the presence of a witness, who shall add to his signature his description and residence: Provided that all insertions in the proxy are in the handwriting of the witness and the witness shall have certified at the foot of the proxy that all the insertions have been made by him at the request of the creditor, and in his presence before he attached his signature or mark.