Recurring Update Default Contact Person for Emailing

Update can be done on the invoice document or template or customer setup contact person

Debtors Module> Configuration> Debtors Setup> Edit Debtor> Contact Person> Add

There are two option

After clicking update documents you will see the screen below: 

Select a document you want to update and put a tick on the option you want to update

Once, complete click continue

and the screen below will appear notifying you that the update has been completed successfully

To access Contacts Via debtors documents

Go to an open document

After, accessing the invoice you wish to view, or you have added go to the Address Tab of document

Click on View button

To edit, add or delete a contact person click on the view button, 

It will take you to the screen below: