If you have a payment processing enabled in myfrontdesk - you can authorize guests' credit cards which holds a certain amount on their card to guarantee the stay. You can charge this amount later.
This article shows how to authorize credit card using payment gateway connected to myfrontdesk.
Things To Note:
-authorization period depends on gateway. Please check with your gateway how long authorized amount will be blocked on card;
-in myfrontdesk maximum period of authorization is 7 days. Authorizations which are more than 7 days old are considered as a auto-voided and are not shown in details.