The instructions for operating the pos machine for the first time are as follows:

1, don't pursue low rate excessively, the normal rate is 0.55-0.6, and never use a single +3 machine;

2. Choose a pos brand with stable policies and integrity;

3. Try to choose the machine without deposit, which has been free for more than two years;

Find a professional and reliable person, not a part-time job.

To sum up, POS machines also need to meet the relevant regulations formulated by the People's Bank of China, and meet the national requirements in terms of hardware, software and security. For example, POS machines need to support chip card, password input, digital signature and other security technologies to ensure the safety of users' funds and transactions.

The fraud post-processing method of pos machine is as follows:

1. Call the brand of the product directly to complain. You can call the headquarters directly to complain, and then explain the situation to the customer service staff. For example, the oral promise of the salesperson and the process of being cheated, it is best to have a text chat record. After explaining the situation to the customer service staff at the headquarters, the headquarters will generally negotiate with the agent to which the machine belongs to verify the relevant information. If its agent handles it improperly, the headquarters will punish the agent. Of course, the deposit you were cheated can also be refunded;

2. Complain on the black cat complaint platform in official website. The black cat complaint platform is a professional complaint platform. No matter what problems consumers encounter in safeguarding rights, they can complain on the platform. They will contact the relevant personnel of their company to negotiate.

Legal basis:

Criteria for judging malicious overdraft of credit cards

Article 7

In violation of state regulations, paying cash directly to credit card holders by means of fictitious transactions, false pricing, cash return, etc. by means of point-of-sale terminal equipment (POS machines). If the circumstances are serious, he shall be convicted and punished for the crime of illegal business operation in accordance with the provisions of Article 225 of the Criminal Law.

If the amount of the act mentioned in the preceding paragraph is more than 6,543.8+0,000 yuan, or the funds of financial institutions are overdue by more than 200,000 yuan, or the economic losses of financial institutions are more than 6,543.8+0,000 yuan, it shall be deemed as "serious circumstances" as stipulated in Article 225 of the Criminal Law; If the amount is more than 5 million yuan, or the funds of financial institutions are not returned more than 6.5438+0 million yuan within the time limit, or the economic losses of financial institutions are more than 500,000 yuan, it shall be deemed as "the circumstances are particularly serious" as stipulated in Article 225 of the Criminal Law.

If the cardholder maliciously overdraws in the above way for the purpose of illegal possession and should be investigated for criminal responsibility, he shall be convicted and punished for credit card fraud in accordance with the provisions of Article 196 of the Criminal Law.

Criminal law of the people's Republic of China

Article 225

The crime of illegal business operation violates the provisions of the state and commits one of the following illegal business operations, disrupting the market order, and if the circumstances are serious, it shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:

(a) operating a franchise or monopoly commodity or other commodities whose operation is restricted by laws and administrative regulations without permission;

(2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;

(three) without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business.