These messages can also have a condition associated with them and be sent only when a reservation has a specific status (e.g. it’s confirmed). You can use these messages as reminders or invitations to make the payment (e.g. the second part of the payment if you only asked for a partial payment when the reservation was made). You can also use them to have an email sent to the customer after the rental is finished to thank them for coming and offering them a discounted voucher code for the next visit.
Adding a message sent 3 days after reservation was made
Note that for whole day- or night-based resources, the start time of a rental is midnight (0:00) of the arrival date, so if you set a notification to be sent N hours before arrival this will be calculated using midnight as the base.
Note that in Site settings / Active features you can select the option Send notifications programmed for night-time (22:00 - 08:00) on the evening before in order to prevent notifications sent before/after an event from being sent during the night.