The guarantee is given either on the cheque or on an allonge, or by a separate document indicating the place where it was made.
It is expressed by the words “bon pour aval” or any other equivalent wording; it is signed by the giver of the guarantee.
It is considered to result solely from the signature of the giver of the guarantee, affixed to the front of the cheque, except when it is the signature of the drawer.
The guarantee must indicate on whose behalf it is given. In the absence of such indication, it is deemed to have been given on behalf of the drawer.