The payment may be for any type of goods or services that have been provided by the collector. A general payment due invoice is provided here should the collector wish to remind the debtor that a payment is due but does not demand that they pay in a specific time period. All invoices must include a description of the goods/services provided as well as the total amount owed by the client/customer. (If the demand is for rent, the landlord will be required to follow the landlord-tenant laws within the State.)