2310.7 (A) The Legibility Requirement
A notice of termination may be recorded, provided that it is legible and is capable of being imaged or otherwise reproduced in legible copies using the technology employed by the U.S. Copyright Office.
A notice should be submitted in a visually perceptible form, it should be sufficiently legible for the recordation specialist to examine and index the contents of the notice, and it should be sufficiently legible for the Office to scan the notice into the public record. To facilitate the imaging process, notices and any attachments thereto should be 8 ¬Ω by 11 inches in size, and the pages should be clipped together rather than stapled.
When the Office records a notice of termination, it creates a public record that reflects the nature of the document. These records may be searched by entering certain key information, such as the title of the work. If the notice is illegible or if it cannot be legibly reproduced by the Office, the recordation specialist may communicate with the remitter or may refuse to record the notice.
37 C.F.R. § 201.10 (F) (1)(iii).