Not a banker, but as a consultant, I advise you to have customers sign they are not purchasing the products, when offered. Over my nearly 30 years, I've seen a few cases (only a few) where someone claimed they wanted credit life/disability insurance and somehow won the case. These are extreme cases, but it's nice to have the evidence you offered and they declined. Also, if your institution makes this a procedural requirement, it allows you to offer it to every consumer - and possibly result in more sales.