A few things need to be true for the email/SMS/WhatsApp side of a reminder to go out, beyond the balance actually being overdue: the party needs an email address or a mobile/phone number saved on their record, and email or SMS/WhatsApp sending needs to be turned on for your account. If either isn't set up, the reminder still appears as an in-app notification — it just doesn't reach the party by that channel.
If you've added a party's contact details and reminders still aren't going out by email or SMS, contact us and we'll check your account's setup.
