- report the buyer
- do what the customer requests
- ignore the buyer
- refuse but not report the buyer
A “project billing system” is a method for calculating and billing the project costs to your clients. Important: After making an invoice based on this project’s expenditures, you will not be able to change the project billing process (more details here). A payment schedule is the notice you must send to a claimant in response to a payment claim. It must… specify all of the reasons why if the payment is less than the sum claimed; and… be sent to the claimant within 10 business days of receiving the payment claim.