一、什么是限额？
POS machine limits are common with merchants that settle private accounts, such as single transaction limits, single card transaction limits, or daily arrival limits. Different limit requirements are made according to different risk control policies of the acquirer to reduce illegal transactions. risk.
2. What is code hopping?
The so-called code-hopping general situation means that the merchant clearly applies for standard industry rates, but the actual consumption statement is for industries with lower rates such as preferential or relief, and the acquirer to obtain a higher fee difference profit. .
Merchants often wonder why the previous consumption has points but now there are no points or sometimes there are no points. This is caused by the acquirer using the system to determine the transaction amount and transferring profitable transactions to channels with lower rates.
3. What is the local business landing?
The so-called landing merchants refer to POS machines or card readers applied by some individuals for swiping their own credit cards. If the card issuer sees the card in the background, it will always be considered to be in the same merchant. In this case, the acquirer is set in the system, and each transaction can automatically jump to display a different merchant name, and the merchant's address is local. If you do n’t go to the ground and jump to merchants all over the country, spending in a short time in a different place is obviously an abnormal consumption, which will affect the use of credit cards.
4. Can the name of the merchant be taken casually?
It is not allowed to arbitrarily, according to the requirements of the transaction message (Guide to fill in the merchant name in Chinese) prescribed by UnionPay, the merchant name is composed of administrative divisions, font size, industry, and organizational form.
5. What is one machine and one yard?
The formally processed machine is one machine and one code. According to the merchant ’s five-certificate information, the merchant ’s MCC code authorized by UnionPay and available for inspection is bound to a machine to ensure the merchant ’s funds safety.
6. Why the POS machine does not have the function of checking the balance
In order to prevent malicious testing of the password behavior of the bank card, some acquirers turn off the bank card balance inquiry function.
7. What is a cutting machine?
Replace the original bank card acquiring provider of the POS machine with a new bank card acquiring provider.
8. What brings a mobile phone to the network?
The source of the POS terminal generally has two places, either the customized machine provided by the payment company, the POS machine program belonging to the brand has been installed in the POS machine, or the bare machine sold by the POS terminal manufacturer, by the downstream channel Negotiate and purchase, and install the POS machine program of the model provided by the payment company, and you need to enter the self-carried bare metal device number into the payment company's system database. Many payment companies support their agent channel providers to take the opportunity to access the Internet. However, in fact, according to the UnionPay regulations, this kind of behavior is likely to cause potential transaction security risks and is not allowed.
9. What is bottom secret and decryption?
The full name is the bottom key of the POS machine. Generally, the bottom key is a model customized by the third-party payment company at the terminal manufacturer to protect the program and data transmission security of the POS machine. The decryption, as the name implies, is to clear the program to facilitate writing new programs to facilitate the cutting machine. In most cases, the POS machine with the underlying key needs to replace the chip that stores the program before it can be cut.
10. What is cash out?
Refers to the act of a credit card holder using a POS machine to make a fake purchase, so that the funds in the credit card are transferred to the POS merchant account through "consumption", and the merchant cashes the remaining funds to the cardholder after charging a certain "benefit fee".
11. What is a card?
Raising a card means that some players who “use the applied credit card for personal financing” maintain and maintain their own credit card, and keep the credit card with a good card use record to protect the existing amount or to increase the amount according to the card issuer ’s rules after a period More activity funds.
12. What is right and wrong?
Generally speaking, the POS machine has a non-connection function, which means that a bank card with a chip can be used on a POS machine with a non-contact reading function. This function involves production costs, so it is generally a non-standard module of a traditional POS machine.
13. What is an electronic signature?
The electronic receipt automatically generated by the POS terminal according to the consumption order and provides the signature function.
14. What is the SN number, device number, and serial number?
The product serial number of each terminal of the POS machine manufacturer is generally called the SN number, which is generally printed on the back of the POS machine. The purchaser needs to enter the SN number in the system before the POS machine can perform data connection with the system background.
15. What is T + 1 / T + 0 /, D + 1 / D + 0?
T + 1 is the second working day;
T + 0 is the working day;
D + 1 is the second Arrival days (including rest days and holidays);
D + 0 is arrival day of the year (including holidays and holidays).
16. What is the withdrawal fee?
Generally, it refers to the service provided by the acquirer on the same day and the payment made by the consumer on the merchant's POS machine is normally received the next day, that is, T + 1. And merchants need to arrive in time on the day of the service, that is, T + 0 or D + 0 account service, you need to apply for withdrawal, because the cash withdrawal is advanced by other parties, you need to charge a certain percentage of the withdrawal fee.
17. What is a foreign currency machine?
POS machines that can support foreign bank cards (Visa master) can be used. Most companies that apply are: bars and restaurants, star hotels, foreign trade companies and industrial enterprises that often go out to participate in the exhibition. As far as the POS industry is concerned, there are generally only two situations in which foreign currency POS machines are asked. One is cashing, and the set is basically a foreign fake card copy card, and the other is a maintenance card. At present, there are mobile applications for foreign accounts. Payment software + credit card head, and then use the software to locate the mobile phone abroad, simulate the situation of foreign transactions, consume a few dollars, and do not arrive, but some credit card issuers will temporarily increase their credit for credit cards that can be traded abroad. Amount, so some people use this to carry out card raising business to earn high handling fees, but there is a risk of credit card being blocked.
18. What magnetic stripe card or chip card?
There are generally two types of bank cards, debit cards and credit cards. Debit cards generally refer to savings cards, and credit cards generally refer to credit cards. There are generally three technologies for storing data and information on bank cards. A single magnetic stripe Card, the other is a magnetic stripe + chip bank card. Bank cards issued after 2015 are basically single chip cards. After October 2014, the People ’s Bank of China deployed and implemented a nationwide POS machine that will shut down chip bank card downgrade transactions. At the same time, bank cards with a magnetic stripe + chip will only be able to insert the chip and cannot swipe the magnetic stripe. Card era.
19. What is CVV2 code?
The CVV2 code, also known as the credit card security code, is a security code for credit card transactions. It is usually the last 3 digits of the italic type printed after the signature on the back of the bank card. The CVV2 code is used to confirm that the payer actually owns the credit card during the transaction, thereby preventing credit card fraud. The importance is equivalent to the second password of the bank card.
20. What is a "downgrade transaction"?
Downgrade transaction refers to: when the bank card chip data cannot be read, downgrade reads the magnetic stripe, but now the bank gradually closes the downgrade transaction, when the POS is operated, it is inserted and brushed again. It will lead to the situation that the POS prompts to refuse to downgrade the transaction.
Twenty-one, what is the line number?
The bank number is the unique identification mark of a regional bank. It is used for cross-regional payment and settlement services organized by the People's Bank of China, such as large-value payment system \ small-value payment system \ city commercial bank bank draft system \ national check image system (including the same city bill automatic clearing system in some cities). Consists of 12 digits: 3 digits bank code + 4 digits city code + 4 digits bank number + 1 digit check digit, which can be searched on Baidu search query bank number.
22. What is a fake credit card?
Refers to a card that is not a credit card used by the credit card, but a criminal who has copied the original card information through its technical means to carry out an illegal card swipe and cash out.
23. What is advance payment?
If the merchant's liquidation funds appear to be the difference, the object of the liquidation of the difference fund should be the acquiring institution. The merchant's difference payment funds are advanced by the acquiring institution, which is called "acquisition advance payment".
Twenty-four, what is the catch?
A fund risk management service provided by UnionPay is mainly applicable to historical transactions that have been liquidated within a prescribed period (the time can be set by UnionPay parameters, and the default time is within 60 days). If the acquirer judges that the transaction also needs to be withdrawn, the acquirer can complete the transaction withholding instruction by issuing a transaction withholding instruction to the clearing system, and the merchant clears the transaction clearing funds. The funds are cleared from the merchant on the same day. Deductions from funds.
25. What is a reserve fund?
Also known as "payment reserve". Broadly defined payment reserve, including cash in stock and deposits in the central bank, the former is called cash reserve, the latter is called deposit reserve, where deposit reserve is the main body. China's collectively known payment reserve, or reserve, is a deposit reserve in the narrow sense, that is, deposits deposited by professional banks and other financial institutions with the central bank. Chinese professional banks and other financial institutions pay the central bank ’s deposit reserve in accordance with the prescribed ratio. Except for the reduction in customer deposits, the deposit reserve can be reduced or used. In fact, it cannot be used as a payment reserve. Since 1989, the Central Bank has separately verified the ratio of payment reserves to customer deposits according to the different circumstances of various professional banks and other financial institutions. Unless there are special circumstances, the deposits in the central bank shall not be lower than this ratio.
26. What is a positive transaction?
That is, a transaction has been set as a success flag in the terminal, but the account transaction package sent to the host has not been responded, that is, the terminal transaction timed out. Therefore, it is uncertain whether the transaction is successfully completed on the host side. In order to ensure the interests of the user, the terminal sends a request to the host again to cancel the transaction pipeline. If the host side has successfully completed the transaction, the transaction is rolled back, otherwise it is not processed. , And then return the processing result to the terminal.
