A page that is attached to a document. It is set up as belonging to the document that it accompanies, but it is not used to classify the document, and no information can be extracted from it. It does not need a separate document specification. Examples of appendices: a shipping list or a list of telephone charges.
See also:
Invoices with appendices: Overview
Setting a page as an appendix (during Inspect and Verify)
Setting an appendix or separator as a document (during Verify)