Payment gateway is a system which acts as a window between the fintech systems and the website system.Fintech system basically includes the financial system which runs under bank or other systems. Due to this, a sensitive form of testing is executed in the payment gateway system. The testers are handled with the responsibility of making sure that the payment system doesn’t create any data breach. Data breach includes the users confidential information like their bank details, user ID account number and passwords.Password encryption check is a must in this type of testing.

To make the online shopping smooth and stress free, these testing procedures are applied which includes various types of techniques.They are : 

1) If all the features are fully displayed or not .

2) The logos can be seen or not.

3) All the logos and functions work properly or not. 

4) Testers should check that,if a huge number of audiences come to use the gateway from different users , the payment gateway crashes or not. 

5) Verify that the company logos are visible are not.

6) Check if the credit card number is masked or not.

7) Check the cards getting automatically added or not.

8) Check if the user gets ahead or not without filling all the required information or not.

9) Check if the currency changes with the language changing or not. 

10) Verify whether the multiple payment options are not selected at the same time.

11) To check when the user is logged in , clicking on back or any other button doesn’t make the user log out.

12) Check if wrong OTP confirms the payment system or not.

13) Check whether the wrong/right date which one works for the payment system.

14) Wrong debit card no is must in the checklist.

15) Double payment.

16) Check correct messages for the payment.

17) Check the payment gateway mails the users personal mail or not.