Debt Collection Transactions

Hi Brains Trust

We recently used a debt recovery company to recover an outstanding payment of an invoice. The customer had made a part-payment, and then didn't pay the rest.  Through the debt company, we received the outstanding payment less the fee which the devt collector kept and passed on the remainder.

Initial invoice $2090

Initial payment $500.00 (which was allocatod to the initial invoice ages ago)

Debtor owed $1590

Debtor made payment of $1590 to debt collector, and amount deposited in our account $1240.20

Debt collector 'paid' $349.80, although no actual payment made.

I have no idea how I close out the invoice, as the outstanding invoice amount and amount paid do not match.  Also do not know how I out through the 'payment' to the debt collection company.

Please send help :-)