Use of pencil is prohibited. Bidders must submit a completed Certificate of Assurance (COA) form along with the Bid.Purpose. This document explains the key activities involved in respond to a bid . ERASURES OR CORRECTIONS: When filling out the Bid Proposal Form, bidders are required to use a typewriter or complete bid proposal in ink. 1. THE SCHOOL BOARD OF MIAMI-DADE COUNTY, FLORIDA.