The Office of Secretary of State is solely responsible for the processing of all CNS filings & searches effective February 1, 2007 and onward. Effective 12-1-2014 and onward, UCC filings & searches must be done with the MN Secretary of State's Office also.
Their contact info is:
Office of the Secretary of State
Retirement Systems of Minnesota Building
60 Empire Dr, Suite 100
St Paul MN 55103
Metro Area Phone: (651)296-2803
Greater Minnesota Phone: (877)551-6767