What is the difference between second and third pillar certification?

To advise on second-pillar schemes you need Wft Pensioen, on top of Wft Basis and Wft Vermogen. Those schemes fall under the Pensioenwet.

For the third pillar that is not required: a lijfrente falls fiscally under wealth accumulation, so Wft Basis and Wft Vermogen suffice. That makes it more accessible for advisers without a pension module who do advise on wealth. More at for intermediaries.