Doing so violates the Standards of Ethical Conduct for Employees of the Executive Branch, which applies to postal employees.
USPS employees also cannot use postal equipment to perform outside work.
“Our customers expect us to use postal time and property for postal business,” said Natalie Bonanno, the USPS acting associate general counsel. “Maintaining the public’s trust is absolutely essential to driving positive business results.”
For further guidance, send an email to the USPS Ethics Office at firstname.lastname@example.org.