If both parties agree to the modification of the receipt, it will be legally binding. However, try not to modify the receipt when signing the receipt. If you write something wrong, you can re-write it. Write one. If it doesn't work and needs to be revised as a last resort, both parties should know and agree with it.

1. Does an altered receipt have legal effect? ??The key to whether an altered receipt is valid is whether it has a substantial impact. The other party found someone to imitate your handwriting and added interest content. The increased interest portion is invalid. There is no substantial impact on the loan principal, so the principal part is valid. 1. The receipt is a written certificate issued by the person who has a legal reason to accept the property to the sender after receiving the property. 2. The receipt should include five elements: payer, recipient, reason for delivery, delivery content and delivery time. 3. On the basis of meeting the above five elements, the receipt will be effective once the recipient signs (seals) it. Basic requirements for signing a loan contract: 1. The loan contract must be signed in accordance with the credit plan and relevant regulations approved by the state to ensure national credit balance and fund management. Banks should review companies that apply for loans, mainly checking whether the products produced by the company are marketable and whether the company's loans are earmarked for specific purposes. 2. The lender should conduct an investigation on the credit standing and operating conditions of the loan applicant and should not sign a loan contract with an unguaranteed enterprise. 3. Government agencies, financial departments, public institutions, mass organizations and units without sufficient repayment capacity cannot serve as loan guarantee witnesses. 4. The interest rate of the loan contract should be signed according to the interest rate uniformly stipulated by the People's Bank of China, otherwise the signed loan contract will be invalid. Article 502 of the Civil Code: A contract established in accordance with the law shall take effect from the time of its establishment, unless otherwise provided by law or otherwise agreed upon by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should be subject to approval and other procedures, the provisions shall be followed. If the failure to go through approval and other procedures affects the effectiveness of the contract, it will not affect the effectiveness of the contract's obligations such as reporting for approval and the effectiveness of related clauses. If the party that should go through the formalities such as application approval fails to perform its obligations, the other party may request that it bear liability for violating such obligations. In accordance with the provisions of laws and administrative regulations, if the modification, transfer, termination, etc. of a contract require approval and other procedures, the provisions of the preceding paragraph shall apply.

2. Whether the modified IOU is still valid. To check whether the modified IOU is valid depends on whether the specific content of the IOU has been changed, and the IOU should have the following contents: 1. The borrower and the lender should be clearly stated. The full legal name of the person; 2. The loan amount should be written clearly, including the amount in uppercase and lowercase letters; 3. The loan time period should be clearly written, including the start, month and day of the loan and a clear loan period; 4. The repayment should be clearly written The specific year, month and day; 5. The interest on the loan should be clearly written, there should be a clear annual interest rate or monthly interest rate, and the final total amount of loan interest payable (including the amount in uppercase and lowercase letters) and other agreements; 6. The repayment of the principal and interest of the loan should be clearly written The year, month, day, time and payment method; 7. There should be a personal signature, fingerprint or handwriting of the borrower. To sum up, when writing documents such as receipts, you should pay great attention to the content and regulations of the receipt. The content of the receipt must be reasonable and legal. If there is any violation of legal regulations, it will not be done. Obtain legal protection, and try not to make alterations on the receipt. The above is the content compiled by the editor.