Legal analysis: before signing a contract, you should know in detail, keep the certificate and protect your rights and interests. If the agreement does not clearly stipulate the transfer fee, the consumer can negotiate with the merchant to solve it. In addition, according to the principle of good faith, the transfer fee should be charged relative to the actual loss. If the transfer of the fitness card by the consumer adds extra cost to the business, it is reasonable and legal for the business to charge a certain handling fee, but it should correspond to the actual expenditure and should not take the opportunity to harm the legitimate rights and interests of the consumer.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 577 Where a party fails to perform its contractual obligations or fails to perform its contractual obligations in conformity with the contract, it shall be liable for breach of contract such as continuing to perform, taking remedial measures or compensating for losses.

Article 578 Where a party expressly expresses or shows by his own behavior that he will not perform his contractual obligations, the other party may require him to bear the liability for breach of contract before the time limit for performance expires.

Article 579 If one party fails to pay the price, remuneration, rent or interest, or fails to perform other monetary obligations, the other party may demand payment.

Article 584 Where a party fails to perform its contractual obligations or fails to perform its contractual obligations in conformity with the contract, thus causing losses to the other party, the amount of damages shall be equivalent to the losses caused by the breach of the contract, including the benefits that can be obtained after the performance of the contract; However, it shall not exceed the losses that the breaching party foresaw or should have foreseen when concluding the contract.