DeClue Death Certificates
If you have ancestors who died in MISSOURI after 1909, you will want to check out this site, and often: http://www.sos.mo.gov/archives/resources/deathcertificates/http://www.sos.mo.gov/archives/resources/deathcertificates/
The Missouri State Archives is now scanning and posting online, ALL Missouri Death Certificates.Once at the site, scroll down to their search engine.I've found it best to simply enter a surname and hit search (or press "Enter") and their entire database for that surname will come up.From there you can view those certificates that have already been scanned, or order a photocopy if not yet scanned.
Hope this helps others as it did with my DeClue line