Filing a Mandamus lawsuit or APA (Administrative Procedure Act) action is one of the most effective ways to compel the government to act on a delayed immigration case. However, filing the complaint is only the first step. To move your case forward, you must complete a crucial — though often overlooked — procedural requirement: serving the complaint. Without proper service of process, your case will simply sit idle, and the government will never be required to respond.

This guide explains how to properly serve your complaint in a Mandamus lawsuit, especially if you’re representing yourself pro se or if you’re an immigration lawyer handling federal litigation for the first time.

Why Serving the Complaint Matters

Service of process is the formal procedure for notifying the government that it has been sued. Until you properly serve the complaint, your lawsuit does not legally advance — the government is under no obligation to respond, and the court cannot proceed with your case.

Once service is complete, the government typically has 60 days to respond to your complaint. This is the point at which your lawsuit truly begins.

Step-by-Step: How to Serve Your Mandamus Complaint

Serving the U.S. government in an immigration delay case is far simpler and less dramatic than the “you’ve been served” scenes seen in movies. Here’s exactly what you need to do:

1. Prepare the Documents:
   1. A copy of your filed complaint.

   1. A copy of the summons issued by the federal court.

2. Send Certified Mail to the Required Parties:
   You must send copies of these documents by certified mail to all of the following:
   1. The U.S. Attorney General – at the Department of Justice in Washington, D.C.
   1. The U.S. Attorney’s Office – in the federal district where you filed the lawsuit. For example, if you filed in Manhattan, you would send a copy to the U.S. Attorney’s Office for the Southern District of New York.

   1. The Agency or Agency Head You Are Suing – for instance:
      1. If your case involves a consulate, send a copy to the Office of the Legal Adviser for the Department of State.

      1. If you are suing USCIS, send a copy to the General Counsel’s Office for the Department of Homeland Security (DHS).

Official mailing addresses for these offices are publicly available online. Always use certified mail so you have proof of delivery.

• Wait for the Government’s Response:
  Once all parties have been served, the 60-day response clock begins. The government must either respond to the lawsuit or take action on your delayed case within that timeframe.

Common Mistakes to Avoid 

• Failing to Serve All Required Parties: Leaving out one of the required recipients can delay or even jeopardize your lawsuit.
• Not Using Certified Mail: Without proof of delivery, you may face challenges proving proper service.
• Forgetting the Summons: The summons is just as essential as the complaint itself. Both must be served together.

Final Thoughts

Serving the complaint in a Mandamus lawsuit is a straightforward but critical step. Without proper service, your lawsuit remains inactive, and the government is under no obligation to act. Once service is complete, the process begins — and the government typically has 60 days to respond, often prompting action on delayed immigration cases.

At Immigrant Lawyer, we guide clients through every stage of the Mandamus process — from drafting and filing the complaint to ensuring proper service and litigating in federal court if necessary. If your immigration case has been delayed for far too long, call us at +1 (972) 333 2121 for a free case evaluation.