Here's a link that describes the quiet title process:
Here's a link with a sample complaint (you would need to change the reference to california court to the appropriate Washington D.C. court):
http://www.kinseylaw.com/attyserv/civil/complaints/quiettit.html
Here's a helpful link for filing lawsuits in Washington D.C. courts:
http://www.dccourts.gov/dccourts/about/prose.jsp
Please let me know, if you have follow-up questions.
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Attorney
Attorney and small business owner with 8 years experience in the general practice of law.