Timesheet invoice sent to old address after recent change

Provide a quick answer to the common query we receive about why are timesheets still being invoiced to the old address.
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Only timesheets created after the change of an invoice address can be billed to the new address.
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To resolve this remove the original timesheet and create a new timesheet. If they've already been invoiced you have to credit them, create a new timesheet and then invoice the new timesheet.