Approval configurations must match Invoice

When approvers have been invited. When approvers have been assigned a tier configuration. 

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The invoice and and the approver will be matched.

You as the user of the software should set up these configurations that match your unique business rules. The software offers all the options for your business rules to be implemented. 

Note: It is possible no approver matched the configurations. If that happens the configurations must be edited. This is found by the edit tier link in the approver user table list.