Are there special instructions for packaging copies of my work(s) for mail or courier delivery?

“To avoid damage to your deposit due to Capitol Hill security measures, please package the following items in boxes rather than envelopes for mailing to the Copyright Office:”

• Electronic media such as audiocassettes, videocassettes, CDs, and DVDs
• Microform
• Photographs
• Slick advertisements, color photocopies, and other print items that are rubber- and vegetable-based

— U.S. Copyright Office, eCO Online System

“Also please note that CDs/DVDs packaged in standard full-sized jewel boxes are more likely to survive the mail radiation process than those packaged in slim-line case.”
— U.S. Copyright Office, eCO Online System