All you need is the check, application and proof of certification if you are past 10 years since your last certification. If something needs notarized they will do it. Go first thing on a renewal day and you will probably be out of there in 10-15 minutes with your new permit.

You can also call them to verify you have what you need. They are usually very pleasant and helpful. 720-874-3895

It looks like they are changing residency and payment requirements to make it a little easier too. http://www.co.arapahoe.co.us/index.aspx?NID=897