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The differents ways to create card alias




At SlimPay, card aliases and tokens replace sensitive data (such as a bank card number) with references (aliases/tokens). The card data authorized to be stored is saved in an encrypted format in a secure SlimPay environment.

The SlimPay electronic signature module sets up aliases.

This article has information on:

The customer path

To streamline the process of enrolling new customers, SlimPay has invested heavily in its client interfaces to provide a friction-free application experience. 

There are two steps in the card alias setup process:

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Step 1 – Entering bank information

The account holder is asked to enter the number, expiry date and CVC on their bank card.

Step 2 – Validating the data sent to the merchant

The SlimPay Checkout informs the debtor that the bank information has been sent to the merchant and the card alias has been set up.

NB: The alias card reference cannot be generated by the merchant. This reference can only be provided by SlimPay.


When creating an alias via the Checkout, your client is informed in the event of an invalid entry of the card number or CVC. Other technical errors may arise, for example when the card has been declared stolen.


Request for information

When a card alias is created, in most cases your customers will not see any transaction line on their bank account statement, with the exception neo-bank customers (Boursorama, Revolut, N26, etc.). Those customers should see a 1 euro authorization on their bank statement. The purpose of this authorization is to verify the existence of the card, and should eventually disappear after 7 days.

You can also opt for a 0 euro authorization, also called request for information, to avoid the situation where the card is rejected for insufficient funds at the time of the verification. The card alias creation will trigger a request for information, and an amount of 0 euro will replace the 1 euro default amount. To enable this feature, please reach out to our support team.


Request Card alias migration

For merchants already accepting card payments via their previous payment service provider, SlimPay can migrate all the card aliases to ensure service and payment continuity.

For the merchant, this means gathering all the card payment data from their previous supplier, then combining it with the other information in their possession (e.g. cardholder name) and sending it to SlimPay in a specified format.

Once SlimPay has received all of the required information, the files are checked and if they meet the criteria, the card aliases are then set up in the SlimPay database. This will allow merchants to quickly collect payments from their existing customers.

Please note that SlimPay only deals with card alias migration and not payment schedules which are handled by the merchant’s individual system.


How does it work?

Below you’ll find the description of card alias migration flows:




  • No disruption to service: Easily migrate all of your customers’ existing card aliases to ensure that future payments associated with the card aliases are collected.
  • Power: Migrate all of your customers’ card data with no restrictions on volume. 
  • Fast migration: Four weeks is all it takes to migrate card aliases, from reception of the data from your previous PSP.  
  • A secure process: The security of customer card data is guaranteed.
  • Bank cards, Visa and MasterCard are supported.



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