What must a PPO include with an invoice when billing a client?

The correct choice indicates that a Private Patrol Operator (PPO) must include any related documentation for billed hours when invoicing a client. This is important because detailed documentation helps to substantiate the hours worked and services provided. Including supporting materials, such as logs or reports, not only enhances transparency but also builds trust with the client by providing a clear account of what they are being billed for. This practice aligns with professional standards and accountability in the private security industry.

When billing clients, the clarity and accuracy of invoices are crucial. By providing adequate documentation along with the invoice, PPOs can effectively justify their charges and address any potential disputes that may arise regarding the services rendered. This transparent approach is essential in maintaining a professional relationship and ensuring that clients feel they are receiving value for the services they pay for.