Hi Kim, there is not currently a way to transfer single Dues invoices from one member to another. This functionality doesn't exist for the Membership Invoices because there is a lot of historical tracking tied into the dues invoices, unlike with a store order or a donations invoice. If there is a single Dues invoice that would need to be moved over to another member, we would recommend creating a new Dues transaction for the correct member and applying the payment/credit administratively to that invoice. The original invoice can then be "refunded" and a note can be made to state that the payment was applied to the new invoice # for the other member account. I hope this helps!
Chelsea VanSolkema | Customer Support Manager | YourMembership