a. The sender's and the addressee's names, occupations, and addresses, preceded by "From" or "To," and directions for handling. (page 2 of the SwapaCD Wrapper qualifies here)
b. Marks, numbers, names, or letters describing the contents. (page 2 of the PBS Wrapper qualifies here)
c. Words or phrases such as "Do Not Open Until Christmas" and "Happy Birthday, Mother."
d. Instructions and directions for the use of the item mailed. (page 2 of the PBS Wrapper qualifies here)
a. Names and addresses of the sender and addressee.
b. Names and quantities of the articles enclosed, descriptions of each (e.g., price, tax, style, stock number, size, and quality, and, if defective, nature of defects).
c. Order or file number, date of order, date and manner of shipment, shipping weight, postage paid, and initials or name of packer or checker.
Including anything but the ALLOWED materials above in your package is a serious infraction of not only SwapaCD rules, but also Federal law. Including inappropriate materials with your books will jeopardize your membership at SwapaCD.
Related Links:
USPS guidelines on attachments/enclosures for Media Mail
How much does it cost to mail a CD?
Which CDs can be posted on this site?
How to Print the SwapaCD Wrapper
What can be swapped here?