Hi @Swaino1!
While you can check for declined payments by accessing the Transaction Status report in your online Square Dashboard, Square doesn’t automatically collect cardholder contact information.
If a payment is declined and you don’t process it again while the customer is present, you won’t be able to retry the payment later without them. We're also unable to contact the customer on your behalf, as their information isn't automatically recorded in our system - unless you've manually added them to your Customer Directory during checkout, with their consent.
We recommend reviewing our online guide for troubleshooting failed payments at point of sale, which includes best practices for identifying declines in the moment and tips on how to ensure you're notified when payments are successful.
Laurie
Community Moderator, Australia, Square
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