Reference iSupplier guide for detailed stepbystep process. Navigating NYCHA's system for submitting sealed bids is not necessarily intuitive.This document is a bid form submitted for the procurement of goods. Gov with the RFB's number and title in the subject line of your e-mail. Contractor certification forms and instructions for completing the forms are attached to this bid. Bid Form for the Procurement of Goods. 5.2.2. Bid Form for the Procurement of Infrastructure Projects. 5.2.3.