How do you file a complaint on a post master?

To file a complaint against a postmaster, you can start by contacting the local post office and speaking with a supervisor or manager. If the issue remains unresolved, you can escalate your complaint by reaching out to the U.S. Postal Service's Customer Service at 1-800-ASK-USPS or visiting their website to submit a complaint online. Ensure you provide detailed information about the incident, including dates, times, and any relevant documentation. Additionally, you can also contact the Postal Regulatory Commission if necessary.