The AICPA employee plans web page has some information on the auditors duties with respect to such agreements. See
http://ebpaqc.aicpa.org/Resources/Health+a...+Agreements.htmThe negotiating of what the auditor can sign is a major issue for most health plan audit engagements. This should be covered during the planning phases of the work. But, even when it is done there, individual claims administrators may change policies and ask for other documents.
Sponsors need to know that the testing of claims data is a required audit procedure and one that the DOL has recently focused upon in their evaluation of the competency of plan auditors.