What I do is serve the tenant the 5 or 10 day notice, and then get my copy notarized. My bank notarizes for free. You must serve the tenant, or any occupant age 13 or older. You can't leave the notice on the door. After the waiting period, when you file the forcible detainer summons with the court, you will need to include your notarized copy and the lease with the request. You or your attorney will need to hire the sheriff or process server to serve the summons. Below is the portion of my notice that has my affidavit of service notarized.
AFFIDAVIT OF SERVICE
I, Lois Ginter, being duly sworn on oath, deposes and says that on the 6TH day of October, 2016, I served the foregoing notice on the tenant(s) named herein: by delivering a copy of hereof to the tenant Dead Weight.
Signed: _____________________________
Subscribed and sworn to me this _____ day of ______________________.
________________________________________________________________________
Notary Public