Which of the following is a requirement for service purchases using GPC?

A written justification being a requirement for service purchases using the Government Purchase Card (GPC) is vital because it ensures compliance with regulations and provides transparency in the procurement process. This justification must detail why the service is needed, demonstrating that the purchase aligns with the organization's needs and budget constraints. It also serves as a record that the purchase was well thought out, ensuring accountability and proper use of government funds.

This requirement supports the overarching objectives of effective management and oversight within government procurement, especially when using a procurement method such as the GPC which simplifies the purchasing process. Without a justification, there may be a lack of clarity regarding the necessity and appropriateness of the service being purchased, which could lead to misuse of funds or failure to adhere to government spending limits.

Understanding and adhering to such requirements helps ensure that service purchases are not only justified but also beneficial to the mission of the Department of Defense and the effective management of taxpayer dollars.