After enabling the credit card tokenization on your Stays.net, you will be able to find the card details in the guest registration page, like the example below:

The screen is for information management and you can blacklist the data (yellow icon) or remove the card (red icon).

Also, during the processing of typed sales, if the guest already has a registered card, it will be possible to select and proceed with the transaction, without the need to re-enter the information: