https://help.myob.com/wiki/x/XS_EAQ
Not available in AO New Zealand
A contact can be removed from your system when you no longer require their details.
Find and open the contact you want to delete. See Finding and opening clients and contacts.
Click Delete contact on the Tasks bar. The Confirm Delete Contact message is displayed.
Click Yes. The contact is removed from the database.
Clients and contacts
Finding and opening clients and contacts
Using the Client page
Using the Contact page
Changing client names and codes
Closing a client
Deleting a client (Not available in AO New Zealand)
Changing clients into contacts (Not available in AO New Zealand)
Changing contacts to suppliers
Viewing all clients and contacts in a family group
Changing contacts’ names
Deleting a contact (Not available in AO New Zealand)
Aliases
Notes on the Main tab
Phone and other details