Problem:

1. When attempting to add a delivery method to a contact, you are unable to add a delivery method because the "Delivery Methods" section of the Contact Record (Contacts > Contact List > {Edit - pencil icon}) is missing:

2. When viewing the notification details under Notifications > Active/History > {title} > Delivery Details, the Call Result show a Delivery Method Value indicating the contact has a delivery method defined:  

 

3. As a result, you are unable to add, edit, remove, or view delivery methods for that contact.

Root Cause:

Invalid data is stored in the contact record. This can happen with contact records that have old data prior to the validation checks that contact uploads have today.

Workaround:

Delete and add the contact record again. Due to current validation checks in the product this will not happen again.