The Check Clearing for the 21st Century Act (Check 21) allows recipients of paper checks to create a digital image of the original check, eliminating the need for further handling of the actual check. The Federal Reserve Board has created a consumer guide . Locate the guide and answer the following:

• What is a substitute check? Does it constitute a legal copy of the check?
• How does Check 21 affect the payment of a companys checks?
• Do banks have to return the actual cancelled checks? Is this an audit issue?