Only an echo of the comments above, I don't think you want or need this level of insight into the administration of the MSB's compliance program. The original guiance on bank/MSB relations made you the
de facto regulatory agency. The revised guidance removed that responsibility. Consider writing a memorandum regarding your review of their operations and your findings that they were satisfactory and then excuse yourself from future monitoring.
On the issue where you actually asked for an opinion
, if reviewing their SARs has brought something to your attention and you find the basis for filing in your own records then you file. The proposed SAR revision mentions "joint" SAR filings so the concept of sharing information with others, including MSBs, isn't off the wall. You just don't want to be the point man on finding out what the boundaries are.
Your second post wasn't visible when I wrote the above... While I don't agree with the criticism, I think the problem was that you had the information and were not using it. Given the criticism, the best solution is to not have the information. Even if this is a valued client, your involvement is very expensive to your institution. Consider requiring them to have independent audits perfromed by an independent firm chosen from a list you provide. You need to get out of the loop.