The legal basis for illegal credit card intermediary rights protection cases involves the following:

1. Contract law: Illegal credit card intermediaries often involve false promises and fraudulent behaviors, violating the relevant provisions of the contract law. Regulation. The Contract Law stipulates that a contract is an agreement with civil rights and obligations and should follow the principles of voluntariness, equality, and good faith. The behavior of illegal intermediaries constitutes contract fraud, and victims can require illegal intermediaries to bear legal liability in accordance with contract law.

2. Consumer Rights Protection Law: In cases where illegal credit card intermediaries protect their rights, the victims can be regarded as consumers and enjoy the rights conferred by the Consumer Rights Protection Law. The Consumer Rights Protection Law stipulates that operators shall provide true and effective information and shall not make false or misleading commercial propaganda to deceive or mislead consumers. The behavior of illegal intermediaries violates the provisions of the Consumer Rights Protection Law, and victims can ask them to bear legal responsibility.

3. Tort Liability Law: The actions of illegal credit card intermediaries cause property losses, mental damage, etc. to victims. Victims can require illegal intermediaries to bear tort liability in accordance with the Tort Liability Law. The Tort Liability Law stipulates that if an actor infringes upon the civil rights and interests of others due to fault, he shall bear tort liability.

4. Goods and Service Quality Law: For service quality issues involved in illegal credit card intermediaries, victims can require illegal intermediaries to bear legal liability in accordance with the Goods and Service Quality Law. The Commodity and Service Quality Law stipulates that operators shall ensure that the goods or services provided meet the standards prescribed by the state and shall not deceive or mislead consumers. Therefore, the legal basis for illegal credit card intermediary rights protection cases involves the above four.