Quoting Lori Bowen Ayre <lori.a...@galecia.com>:
There is also support for SIP clients to retrieve and display a detailed/itemized list of billings to the patron (not sure how that fits in with SIP2)
It is done by making a 63 request for patron information and setting the appropriate flag on the request: a Y in position of the summary field.
-- Jason Stephenson Assistant Director for Technology Services Merrimack Valley Library Consortium Chief Bug Wrangler, Evergreen ILS