So, I have an application where the user needs to register to access the application.
I am planning to run an offer where the user can order that item only once a day.
But I have the doubt that he can change the login ID (if he has several emails) and can place the order with different IDs.
I am thinking of registering the device with an email ID:
– You cannot log in with a different email ID.
– The application cannot be used on a different device (if it is changed), since it can give an error email ID already registered on another device, which leads to canceling the registration of the previous device (it is possible that the device not available). It takes a long time. This can lead to loss of customers.
Also, read about the IP tracking, phone number and credit card details, but you are not satisfied with the answers (someone has already raised the same thing).
So what will be a good method to avoid multiple logins / registration from the same device?