I don't think I can cite a reg Maria, but we have taken the position that it can be considered deceptive to mix communications with the customer. The NDIPs are not insured, the deposits are, so we wouldn't mix the two. My little old grandmother wouldn't know the difference, might buy an annuity from us thinking it has FDIC insurance, and there goes our reputation.
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Societies that do not find work in and of itself "pleasing to God and requisite to Man," tend to be highly corrupt.