Legal analysis: it has no legal effect. 1. The loan guarantor needs to be signed by both husband and wife, because if the guarantee is based on the family property of both husband and wife, it must be agreed by both parties, and one party's signature cannot be established. 2. As for the consequences, it is necessary to know whether the loan guarantor guarantees in the form of general guarantee or joint and several liability guarantee. The difference between them is as follows: (1) The parties agree in the guarantee contract that when the debtor fails to perform the debt, the guarantor shall bear the guarantee responsibility, which belongs to the general guarantee. The guarantor of a general guarantee may refuse to undertake the guarantee liability to the creditor before the main contract dispute has been tried or arbitrated and the debtor's property has been enforced according to law. (2) If the parties agree in the guarantee contract that the guarantor and the debtor shall be jointly and severally liable for the debt, it is a joint liability guarantee. If the debtor of joint and several liability guarantee fails to perform the debt at the expiration of the debt performance period agreed in the main contract, the creditor may require the debtor to perform the debt, or may require the guarantor to assume the guarantee liability within the scope of its guarantee.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 681 A suretyship contract is a contract in which the surety and the creditor agree that the surety will perform the debt or assume the liability when the debtor fails to perform the due debt or the circumstances agreed by the parties occur.

Article 682 A suretyship contract is an accessory contract to the principal creditor's rights and debts contract. If the principal creditor's rights and debts contract is invalid, the guarantee contract is invalid, unless otherwise stipulated by law. If the debtor, guarantor and creditor are at fault after the guaranty contract is confirmed to be invalid, they shall bear corresponding civil liabilities according to their faults.

Article 683 A legal person organ shall not act as a guarantor, except for the use of loans from foreign governments or international economic organizations with the approval of the State Council. A legal person not for profit or an unincorporated organization for public welfare may not act as a guarantor.

Article 1064 The debts incurred by both husband and wife for the same signature or by one party afterwards, and the debts incurred by one party in his own name for the daily needs of the family during the marriage relationship, belong to the same debt of husband and wife. Debts incurred by one spouse in his own name during the marriage relationship that exceed the needs of family daily life are not joint debts of husband and wife; However, the creditor can prove that the debt is used for the husband and wife's life, production and operation, or based on the same meaning of both husband and wife.