The legal effect of the letter is as follows:

1. To be legally effective, the letter of guarantee and commitment must be the true expression of one party’s intentions, and the content does not violate the relevant provisions of laws and regulations and does not violate public order and good customs. Principle;

2. A written document will be legally effective if it carries legal liability;

3. As long as the written document signed by the parties does not violate legal provisions, is voluntary and true, The expression has legal effect;

4. If it is signed under duress, it will be invalid. If the document does not have clear legal responsibility, it will not be legally binding.

Legal basis: Article 135 of the "People's Republic of China and Civil Code"

Civil legal acts may be in written form, oral form or other forms; legal, If administrative regulations stipulate or the parties agree to adopt a specific form, the specific form shall be adopted.

Article 136

A civil legal act shall take effect upon its establishment, unless otherwise provided by law or otherwise agreed upon by the parties.

The actor shall not change or terminate the civil legal act without the consent of the other party or in accordance with the provisions of the law.

What issues should be paid attention to when writing a IOU

1. The writer of the IOU must be written by the borrower, not the lender;

2. The IOU should be as concise and clear as possible, and do not use ambiguous language;

3. Do not write the reasons and relationships of the IOU;

4. Try to include the ID numbers of the borrower and the lender;

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5. The most important thing is that the borrower’s signature must be seen in person;

6. The IOU itself must be a complete piece of paper, not a torn or cut piece of paper;

7. Regarding the issue of statute of limitations, the 3-year statute of limitations starts from the repayment date. If you do not claim credit against the borrower within 3 years from the repayment date, you will lose the right to win the lawsuit.