Now POS machines are mainly divided into Bluetooth POS machines, electronic POS machines and mobile POS machines. The main trading methods are credit card, flash payment, code scanning and so on.
It is necessary for us to see if there is something wrong with the machine, such as the sensor hardware is broken. At this time, you need to change another credit card for credit card test. If you can swipe other credit cards, it proves that there is no problem with the machine. If two different credit cards can't be swiped, it is probably a machine problem.
Furthermore, we need to consider whether it is a credit card problem. The possible reasons are as follows:
The credit card has expired and it is valid. After the expiration, the user needs to go to the bank to replace the new card.
When the credit card is degaussed, it is easy to increase the number of magnetic stripe cards used, and it may also appear in a strong magnetic environment. The process is also to replace a new card at the bank.
The transaction limit has been reached, and each credit card may set a certain limit, such as daily limit. Every time, every week. If set, the user needs to go to the credit card software to cancel.
Exceeding the limit of POS machines, some POS machines also have a daily trading limit. Once this limit is reached, POS machines will not be able to swipe their cards normally.
The use of credit cards is restricted, which is mostly caused by code skipping or code set of your POS machine. Because most POS machines have this problem now. However, the transaction of code hopping has seriously affected the interests of banks. In order to reduce losses, banks have to control the credit card risk of users who use such POS machines.
Therefore, if you need to apply for a POS machine, you must choose a regular brand POS machine that does not skip the code. Moreover, from the formal channels, we should not be greedy and cheap, otherwise the credit card will be subject to risk control, card closure and reduction. If it's heavy, you can't swipe your card directly.
And what kind of POS machine can be regarded as a POS machine that does not skip codes?
Code hopping POS machine, referred to as BTMPOS.
To some extent, the definition of BTMPOS mainly meets the following requirements:
It is very important to have a formal payment license, which is a necessary condition to ensure the safety of credit card funds.
The POS machine has passed the safety certification of China UnionPay payment terminal, and there is no trace of illegal disassembly in appearance. At present, regular POS machines have their own self-destruction function, that is, if they are dismantled by bad guys, the machines will be scrapped immediately and cannot be maintained, which greatly eliminates the possibility that bad guys illegally modify the machines.
Every trading merchant is a real merchant, and it is possible to find exactly the same merchant name on platforms such as Tianyanchao and Enterprise Query. Note that the name of the merchant can't be wrong. The name of the merchant is the full name of the business license of the merchant, which is unique in China. Some coding POS machines deliberately mispronounce the name of the merchant, missing a word, adding a word, etc. There are problems.
The merchant number is real. The merchant number is the 15 digit code on the receipt, and each digit has its own meaning. And it must be a pure number. Some coding machines secretly change numbers into letters or other special symbols in the background, just to avoid relevant inspections. Finally, through the set of codes, the interests of users and banks are harmed.
The merchant to be traded must be the merchant in the user's area. For example, if a person is in Beijing, then the merchant who trades should also be from Beijing. It is impossible to have a person in Beijing and then trade in a merchant in Shandong.
All the merchants in the transaction must be standard merchants with a rate of 0.6%, and there can be no preferential merchants such as gas stations, supermarkets and water, electricity and gas charges.