Summary of Illinois bond claim and notice laws and requirements for private Illinois projects including free forms, FAQs, resources and more. You must complete either Form REG-4-A or Form REG-4-D to obtain a bond.All we need is a filled out application online. Surety bonds are required in Illinois for a number of purposes. Learn about the bonding requirements and how to get bonded here! Get a Supply Bond Quote Today! ​​ Don't wait to get the supply bond you need to wrap up a deal. You must complete either Form REG-4-D or Form REG-4-A to obtain a bond. Bond Supply, Bond Demand and Equilibrium in the Bond Market. Supply and demand determine bond prices (and bond yields).