Sending Certificate of Service? I found this certificate of service in a Court law book. Here is the exact wording of it. "I certify?

that I have this day served _____________ (opposing party or attorney) with a copy of this Notice of Intent by _____________ sending a copy. first class postage paid through the US mail or by email the the agreement of the (opposing party or attorney) to him / her at ____________ (complete address of party served).

This the _____(day) of ______ (month) , _______ (year).

Sign your name. ______________

Address ____________________

Telephone ___________________

Email ______________________ "

MY QUESTION IS: I READ THIS AS THAT I HAVE TO JUST SEND IT VIA FIRST CLASS MAIL. BUT OTHER PEOPLE ARE TELLING ME, THAT IT HAS TO BE SENT VIA CERTIFIED MAIL. BUT I DON"T SEE WHAT IT STATES OR IMPLIES THAT. HELP. I NEED ADVICE.

P.S. I was not shouting... I was just trying to separate it clearly from the above form. Thanks.