A bank that handles the principal's affairs becomes the subject of regulatory or political attention. Investigations into the bank produce filings that name customers. The principal, who has done nothing wrong, appears in a story they have nothing to do with, because the story names the bank's significant clients as background.

The exposure is not the result of any decision the principal made other than the choice of bank. The choice was reasonable at the time; the bank was reputable; the relationship served its purpose. The bank's later difficulties created a record that the principal had no opportunity to shape.

The defence against this is partial and structural: a banking relationship distributed across more than one institution, an awareness of which institutions carry political exposure beyond the financial, and a conscious refresh of the arrangements when the institutional risk in a relationship changes.

What is visible can be known. Whether to do anything about it is a separate question.