You can refuse to sign,

because the buyer has the right to return or exchange the goods without reason within seven days. When you receive the goods, you can check whether the description of the goods is different from the goods you purchased, and check the authenticity, quality, and transportation damage of the goods. Then sign according to the situation. If it is inconsistent with the facts, you can state the reason and refuse to sign directly, and then communicate and negotiate with the seller to explain the reason.

[Legal basis] Article 24 of the Consumer Protection Law If the goods or services provided by the operator do not meet the quality requirements, the consumer can return the goods in accordance with national regulations and the agreement of the parties, or require the operator to perform obligations such as replacement and repair. If there are no national regulations and agreements between the parties, consumers can return the goods within seven days from the date of receipt of the goods; if the statutory conditions for termination of the contract are met after seven days, consumers can return the goods in time. If the statutory conditions for termination of the contract are not met, the operator can be required to perform obligations such as replacement and repair. If the return, replacement, and repair are carried out in accordance with the provisions of the preceding paragraph, the operator shall bear the necessary expenses such as transportation. Thank you for your consultation and wish you a happy life and all the best!