How do I know what time and date my guest will receive the reminder to make a second payment request?

You must have payment connected and using the charge through Houfy option in order for Houfy to automatically send payment request to your guests.

Yes, Houfy sends a reminders to the guest as well as the owner. Be advised these messages are sent from automated@Houfy.com and could end up in "spam" mail at your guest. Make sure to connect to them directly as well.

You will receive this pop up to confirm.