1. Sign in the blank space on the left side of the IOU (not in the "borrower"), but not in the * * * place of the borrower:

1, the core of civil juristic act is the expression of will, without which there is no juristic act;

2. Sign in the blank on the left side of the IOU instead of "borrower", indicating that the borrowing behavior is not established.

Second, the principle of non-presumption of guarantee: if you sign in the left margin of the receipt (not in the "borrower"), you cannot presume that the legal relationship of guarantee is established without the expression of guarantee intention.

Three, the free contract should be interpreted according to the meaning of lighter liability to the debtor, and the signature on the left side of the receipt is not at the "borrower", which cannot be considered as a * * * relationship with the borrower and guarantor.

Legal basis: Article 143 of the Civil Law stipulates that a civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.