I sent a zero-balance invoice to show items purchased along with a credit for the full purchase amount. This invoice is stuck "pending". The customer has no option to pay or provide a shipping address. It is stuck on their end showing "unpaid". And I cannot mark the invoice as paid on my end. If I try "record payment" I get an error saying "Payment amount should be greater than zero" and if I try applying a payment of, say, 0.01 I get "Payment cannot be greater than the amount due." My only option is to cancel the invoice. But I need to ship the items and want the customer to have a record.
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