In Illinois, a person in possession of a will must file it with the circuit clerk for the county of the decedent's residence within 30 days after the death. While prosecutions are limited to willful cases, failure to file is a criminal offense. Filing the will does not mean it is being probated. See, 755 ILCS 5/6-1.
http://www.ilga.gov/legislation/ilcs/ilcs4.asp?DocName=075500050HArt.+VI&ActID=2104&ChapterID=60&SeqStart=7200000&SeqEnd=9400000
Concerning the house, hopefully various matters were considered at the time the quit claim was prepared, including gift taxes, income tax consequences that may now impact you, the liabilities of any one of the heirs that may now impact the others, etc.
Hopefully, the shortcut estate plan did not cost everyone. Some get lucky, some do not.
