This excerpt taken from the MPET 8-K filed Dec 2, 2009.
The Company generates billings each month to its working interest partners in the properties the Company operates. The resulting receivables, net of royalty payments due to the working interest partners, are due within 30 days of receipt. Interest and other costs are provided for payments not timely received. The receivables are reviewed periodically and appropriate actions are taken on past due accounts, if any.