2. The 2.POS terminal is automatically generated by the system, and a number can be randomly set, which is set by the payment company. But every machine has a SN, which refers to the machine serial number, also called the terminal serial number. Serial number must be unique. If different merchants are bound to the same SN, the background will show that the SN number has been occupied. Therefore, it is not said that one SN can bind multiple terminals.
3.POS system, instant point information system, refers to the system that directly reads commodity sales information (such as commodity name, unit price, sales quantity, sales time, sales shops, customers, etc.). ) When goods are sold through automatic reading equipment (such as cash registers), they are transmitted to relevant departments for analysis and processing through communication networks and computer systems, thus improving operating efficiency.
4. The POS system was first used in the retail industry, and then gradually extended to other service industries such as finance and hotels, and the scope of using the POS system was also from internal expansion to the whole supply chain.
Extended data
At present, the MCC code and terminal number of many large POS machines will change. Of course, there are also some machines with the same terminal numbers, but there will be no risk control problems.
At present, there are many users who brush POS machines by hand. Hand-brushed POS machines are all terminal numbers, so there is no risk control problem. If the wind direction is controlled because of this situation, at least half of the users will be controlled.
The withdrawal amount depends on the individual's comprehensive score, not on changing the terminal number. Users use the POS machine with variable terminal number, and brush it several times a month, two or three times, but they still can't get the amount, and the comprehensive score may not be raised. Therefore, regardless of whether the terminal numbers are the same or not, banks acquiesce in development.
Precautions for POS card swiping:
1, don't not swipe your card at ordinary times, one swipe is a large sum, so swiping your card may lead to the credit card being downgraded and blocked.
2. Do not swipe your card too frequently in a short period of time, and swipe your card during non-business hours, which is vulnerable to bank risk control. It is best to swipe your card between 9 am and 8 pm every day, and swipe the same card at least once every 30 minutes.
3. use POS machines in different places. Because most criminals who steal credit cards commit crimes in different places, bank risk control is very sensitive to credit cards in different places, especially when POS machines are used across provinces.
4. Check the balance on the pos machine and try the password. Some people have too many cards and may forget the password and balance. Now there are many official bank apps that can audit accounts, so be sure to confirm your password and balance before swiping your card on pos, and try not to enter the wrong password on pos, which will easily lead to risk control.
5. The transaction receipt (shopping receipt) after swiping the card shall be kept for at least half a year.
6. If there is no receipt in the pos machine, the transaction is unsuccessful. Sometimes, after swiping the card, the pos machine receives a debit message from the bank without a receipt. In this case, if the transaction is unsuccessful, the transaction funds will be returned to the cardholder's account within 48 hours. If you want to solve it as soon as possible, there are two ways:
(1) When you make an inquiry or make a consumption transaction (any amount) on the POS machine, the POS machine will prompt "Automatic reversal succeeded", and the cardholder will receive another bank prompt message that the deduction has been returned to the account.
(2) The merchant will pay the bill immediately and the money will be returned to the card immediately.
Baidu encyclopedia -pos system
Baidu encyclopedia -POS (sales terminal)