Most Common Will-Writing Mistakes

Originally published: 29 October 2024 | Last updated: 8 March 2026

What Are the Most Common Mistakes When Writing a Will?

Writing a Will is one of the most important legal steps you can take to protect your family. Yet even well-intentioned people make critical errors that can invalidate their Will, cause family disputes, or lead to unintended outcomes. Here are the most common Will-writing mistakes in South Africa and how to avoid them.

Mistake #1: Not Having a Will at All

The biggest mistake is simply not having a Will. Many South Africans — estimates suggest over 65% — die without a valid Will (intestate). Without one, the Intestate Succession Act 81 of 1987 determines who inherits your assets, using a fixed formula that may not reflect your wishes. Common-law partners, stepchildren, and close friends receive nothing under intestate succession.

Mistake #2: Incorrect Signing and Witnessing

Under the Wills Act 7 of 1953, specific formalities must be followed for a Will to be legally valid:

• The testator must sign at the bottom of the last page and initial every other page.
• Two competent witnesses aged 14 or older must be present when the testator signs.
• Witnesses must sign every page of the Will in the presence of the testator and each other.
• Witnesses (and their spouses) cannot be named as beneficiaries — doing so voids any bequest to them.

Even a single missed signature or an ineligible witness can render the entire Will invalid.

Mistake #3: Using Vague or Ambiguous Language

Unclear wording creates confusion and opens the door to legal challenges. Common examples of vague language include “I leave my stuff to my family” or “my jewellery goes to my daughters.” Instead, be specific: name each beneficiary in full (including ID number where possible), describe assets clearly (property erf numbers, vehicle registration details, account numbers), and specify exact percentages or amounts.

Mistake #4: Failing to Update Your Will After Life Changes

A Will is not a “set and forget” document. Failing to update it after major life events is one of the most common — and most damaging — mistakes. Events that should trigger a Will review include:

• Marriage (which automatically revokes a prior Will in South Africa unless made in anticipation of that marriage)
• Divorce or separation
• Birth or adoption of a child
• Death of a beneficiary or executor
• Buying or selling significant assets
• Starting or closing a business
• Moving to a different province or country

Mistake #5: Not Appointing an Executor

Your executor is the person responsible for winding up your estate — gathering assets, paying debts, and distributing inheritances. If you do not name an executor in your Will, the Master of the High Court appoints one, which adds time and cost to the process. Choose someone you trust who is organised, financially literate, and willing to take on the responsibility. Always name an alternate executor in case your first choice is unable to serve.

Mistake #6: Not Naming a Guardian for Minor Children

If you have children under 18, your Will should name a guardian. Without this nomination, the Children’s Court decides who raises your children — a process that can take months and may result in someone you would not have chosen. Also appoint an alternate guardian in case your first choice cannot serve.

Mistake #7: Forgetting to Set Up a Trust for Minor Children

Without a testamentary Trust, your minor children’s inheritance goes to the Guardian’s Fund, managed by the Master of the High Court. The full amount is released when the child turns 18, with no conditions. A Trust lets you specify that funds are released for education, at age 25, or under other conditions you choose — protecting your child from poor financial decisions at a young age.

Mistake #8: Excluding Stepchildren

In South Africa, stating “my children” in your Will does not automatically include stepchildren, even if you raised them from birth. Only biological and legally adopted children are covered by this phrase. If you want stepchildren to inherit, you must name them explicitly in your Will.

Mistake #9: Overlooking Digital Assets

Many people forget to address digital assets in their Wills. This includes social media accounts, cryptocurrency wallets, online banking, email accounts, cloud storage, domain names, and digital subscriptions. Without instructions, these assets may be permanently lost or inaccessible to your heirs.

Mistake #10: Not Considering Tax Implications

Estate duty in South Africa is levied at 20% on the first R30 million above the R3.5 million abatement, and 25% on amounts above R30 million. Capital gains tax is also triggered on death. Proper planning — including the use of Trusts, spousal bequests (which are exempt from estate duty), and life insurance — can significantly reduce the tax burden on your estate.

How Can You Avoid These Mistakes?

How Can LegalWills.co.za Help You Avoid These Mistakes?

LegalWills.co.za guides you through the Will-writing process step by step, ensuring you do not miss critical elements. The platform prompts you to name guardians, set up Trusts, appoint executors, and address all your assets — including digital ones. It produces a legally valid document that complies with the Wills Act 7 of 1953, and you can update it anytime your circumstances change.