Binding death benefit nominations are one of those areas where the technical requirements look simple and the practical execution goes wrong often enough that it has become the leading source of superannuation estate disputes. The mistakes cluster into five categories. None of them are exotic. All of them are avoidable with reasonable care.

Mistake one: missing the trustee requirements

Each super fund has its own trustee requirements for accepting a binding death benefit nomination. Self-managed super funds use the trust deed. Retail funds use the product disclosure statement. The form requirements, witness requirements, and notification requirements vary materially.

Submitting a nomination that meets the statutory minimum but not the fund’s specific requirements is invalid. The trustee will fall back to a non-binding nomination or to default rules. This is the most common failure mode I see.

Mistake two: wrong dependants

A binding nomination can only direct benefits to a dependant or to the estate. The definition of dependant under the SIS Act includes spouses, children, financially dependent persons, and interdependency partners. It does not include adult children who are not financially dependent in the relevant sense.

Nominations naming adult children who are not eligible dependants are invalid in part. The trustee can disregard the invalid portion and apply default rules. This produces outcomes the member did not intend.

Mistake three: failing to renew

Most retail funds require renewal of binding nominations every three years. SMSFs commonly use non-lapsing nominations under the trust deed. The renewal cycle is missed in a meaningful percentage of cases because the member did not understand the requirement.

A lapsed binding nomination reverts to a non-binding effect, and the trustee has discretion. The dispute that follows is foreseeable.

Mistake four: ambiguous wording

Nominations that say “to my children equally” when there is a blended family produce disputes about who counts as a child. Nominations that direct benefits to the estate without checking whether the will is current produce disputes about whether the estate distribution matches the member’s intent.

Precise drafting matters. The same level of care that estate planners apply to wills should be applied to nominations.

Mistake five: not telling the executor

The executor finding out about a binding nomination after the death, when they have not anticipated the impact on the estate, is a common cause of dispute. The estate planning conversation should include the nominations explicitly, and the executor should be aware of what is in place.

The drafting protocol that works

Verify the fund-specific requirements before drafting. Confirm dependant status for each named beneficiary. Set a calendar reminder for renewal at year three. Use precise wording that does not depend on external interpretation. Brief the executor on what exists.

This is unglamorous administrative work. It prevents the disputes that consume estates and produce litigation lawyers as the only winners.