ترجمة - دانمركي -انجليزي - Vedrørende faktura nummer 28327 pÃ¥ beløbet kr....

What is "missing payment"? Is it "late payment" or "non-payment"?

In this case it is not clear if it is "late" or "non-payment".

The amount is described as "Missing" = 'Manglende'.
I can't say if someone have payed less than what he should or if he has forgotten to pay at all.

I would have said "outstanding debts" if I had written the request.