Legal subjectivity:
A letter of guarantee is actually a type of contract and of course has legal effect. However, a valid letter of guarantee must meet the following three conditions at the same time: 1. It is the true will of the parties reflection. The content of the commitment letter should be the expression of the parties’ true inner intentions and cannot be forced, threatened, induced, deceived, etc. 2. There is no violation of relevant legal provisions. The content of the commitment letter must comply with the provisions of the law and must not violate the prohibitive provisions of laws or administrative regulations, otherwise the commitment letter may be invalid. 3. No infringement of the interests of others. The promisor can only dispose of things that he has the right to dispose of, and cannot infringe on the legitimate interests of others. Legal objectivity:
Article 143 of the "People's Republic of China and Civil Code" is valid if the following conditions are met: (1) The actor has the corresponding capacity for civil conduct; (2) ) The expression of intention is true; (3) It does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs. Article 153 of the "People's Republic of China and Civil Code" civil legal acts that violate the mandatory provisions of laws and administrative regulations are invalid. However, this mandatory provision does not invalidate the civil legal act except where such mandatory provision does not render it invalid. Civil legal actions that violate public order and good customs are invalid.