why does the bank ask completely different questions than the insurer when it is about the same thing

The bank looks at money laundering risk, the insurer at credit risk

The bank and the insurer ask different questions because they are legally required to investigate something different. The bank must conduct customer due diligence under the Act on the prevention of money laundering and terrorist financing: who is the company, who are the ultimate beneficial owners, where does the money come from, and is there an increased risk of money laundering or terrorist financing. This explains questions about source of funds, sanctions lists and politically exposed persons. The insurer usually does not have that legal obligation in the same form, and asks mainly about financial health: credit assessment, payment behaviour and annual figures, because that determines whether a policy can be accepted and under what conditions.

This difference in purpose also explains why the same answer looks different at each portal. The bank often asks about the UBO structure itself, with percentages and control; the insurer is more likely to ask about the result of that, such as whether a PEP is involved. Both effectively use the same source in the chain file, but highlight a different part of it. Once someone understands this, they do not need to figure out again with each new list why the questions sound so different — it is the legal basis that differs, not the company answering.

Customer due diligence follows from the AMLA, not from a choice by the bank

This distinction is not in a format of an individual bank, but in the law itself. The Act on the prevention of money laundering and terrorist financing requires banks to conduct customer due diligence, with questions about identity, UBOs and source of funds as fixed components. An insurer who must apply the same law asks comparable questions; an insurer who mainly assesses acceptance risk is more likely to ask about financial figures. If, in addition to the UBO question, you also want to know which supporting document goes with it, you will find that at Filling in UBO information in a questionnaire; for the financial question from the insurer specifically there is creditworthiness as a question from the insurer.