Commentaries: Art. 1021

The guarantee commitment is inscribed on the bill of exchange or an annex (rider) thereto.
It is expressed by the words “as guarantor” or a comment to that effect; it must be signed by the bill guarantor.
The mere act of signing the obverse of the bill of exchange is deemed a guarantee commitment, providing the signature is not that of the drawee or the drawer.
The guarantee commitment must indicate for whom the guarantee is given; where there is no such indication, it is deemed to be given for the drawer.

Art. 1021