When accessing the payment link generated by you, the guest will get to a page with the payment options offered on your website and will be able to finish the payment without the need to be logged in the website.
Then, after validation of the credit card transaction, you will see, after a few minutes, the payment already added to the Reservation.
Remember that for this routine you need to have payment channels enabled in your Stays.net. I want to know more...
Now that you already know how the guest will make the payment via payment link, how about checking out more related subjects?