For the bookings accepted through Vrbo, my rental contract requires the guest to make their second payment through my OwenrRez/Strip account rather than on the Vrbo platform. When requesting the guest submit a credit card the only option I can find is the one to submit a "new" card. The header reads "This page will help you update your billing information so that future payments and security deposits use a new credit card instead of the one on file. Use the fields below to enter a new credit card and select what types of transactions it should be used for." Is it possible to change this heading or am I missing an option to request CC info without requesting payment? The guest does not have a CC on file as they made the initial payment through Vrbo.
You're misunderstanding the message. Requesting the guest's credit card this way, will do exactly what you want - it'll store their information for future use, and then when the scheduled transaction time arrives, it'll use it to make the payment. Not before.