Generally speaking, it is not necessary to notify the guarantor, but the debtor. According to the law, if the creditor transfers its rights, it shall notify the debtor. Without notice, the assignment is invalid to the debtor. However, the guarantor must be informed of the debt transfer. Under normal circumstances, the parties to a contract reach an agreement through consultation, and the debtor may also transfer the contractual debt to a third party with the consent of the creditor. Article 524 of the Civil Code: If the debtor fails to perform the debt and a third party has a legitimate interest in performing the debt, the third party has the right to perform it on his behalf; However, unless it can only be performed by the debtor according to the nature of the debt, the agreement of the parties or the law. After the creditor accepts the performance of the third party, its creditor's right to the debtor is transferred to the third party, unless otherwise agreed between the debtor and the third party.

Legal objectivity:

Article 546 of the Civil Code of People's Republic of China (PRC) * * * If the creditor transfers its creditor's rights without notifying the debtor, the transfer shall not be effective for the debtor. The notice of assignment of creditor's rights shall not be revoked, except with the consent of the transferee.