
When life takes an unexpected turn and someone loses the capacity to make their own healthcare decisions, having a substitute decision-maker becomes crucial. This trusted individual steps into the shoes of the person unable to make decisions, ensuring their voice is still heard when they cannot speak for themselves. Understanding how to choose and properly brief a substitute decision-maker is one of the most important planning decisions you'll ever make.
Understanding Substitute Decision-Makers in Australia
A substitute decision-maker is someone legally appointed to make healthcare decisions for another person when they're unable to do so themselves. Across Australia's states and territories, these decision-makers may be known by different names - enduring guardian, medical treatment decision-maker, person responsible, or attorney for health matters. Despite the varying terminology, their fundamental role remains consistent: to make healthcare choices based on what the person would have wanted, not what the decision-maker thinks is best.
The appointment of substitute decision-makers operates under a hierarchy system established by state and territory laws. If you haven't formally appointed someone, the law automatically identifies who can make decisions for you. This typically includes spouses or partners, unpaid carers, family members, or close friends who have a significant relationship with you. However, relying on this automatic hierarchy isn't always ideal, which is why formally appointing your preferred person is strongly recommended.
Essential Qualities to Look for in a Substitute Decision-Maker
Trustworthiness and Reliability The cornerstone of any good substitute decision-maker is absolute trustworthiness. This person will potentially make life-altering decisions on your behalf, so they must be someone you trust implicitly to honor your wishes rather than impose their own beliefs or preferences.
Strong Communication Skills Your substitute decision-maker must be able to articulate your wishes clearly and confidently to healthcare professionals, family members, and other stakeholders. They need to advocate for you effectively, even in emotionally charged situations or when facing opposition from others who may disagree with your preferences.
Understanding of Your Values and Beliefs Perhaps most importantly, your chosen person should have a deep understanding of your personal values, religious beliefs, life goals, and healthcare preferences. They should know what gives your life meaning and what you would consider an acceptable quality of life versus what you'd find unacceptable.
Emotional Resilience Making healthcare decisions for someone else, particularly in critical situations, can be emotionally demanding. Your substitute decision-maker needs the emotional strength to make difficult decisions while managing their own stress and grief, as well as pressure from other family members or friends.
Availability and Practicality While it's not mandatory for your substitute decision-maker to live in the same city, practical considerations matter. They should be reasonably accessible and able to be contacted when needed. Consider their work commitments, family responsibilities, and geographical location when making your choice.
The Formal Appointment Process
Legal Requirements To formally appoint a substitute decision-maker, you must be over 18 and have decision-making capacity. This means you can understand relevant information, retain it, use it to make decisions, and communicate your choices. The specific forms and processes vary by state and territory, so it's essential to use the correct documentation for your location.
Witnessing Requirements Most jurisdictions require your appointment to be witnessed by specific people, often including a medical practitioner or someone authorized to witness affidavits. These requirements ensure the appointment is made freely and with full understanding of its implications.
Multiple Appointments You can appoint more than one substitute decision-maker, specifying how you want them to work together. Options include appointing them to act jointly (all must agree), severally (any one can act), or in a specific order where one steps in if the primary person is unavailable.
Meet your Legacy Assistant — Charli Evaheld is here to guide you through your free Evaheld Legacy Vault so you can create, share, and preserve everything that matters — from personal stories and care wishes to legal and financial documents — all in one secure place, for life.
How to Brief Your Substitute Decision-Maker Effectively
Comprehensive Values Discussion The most critical aspect of briefing your substitute decision-maker is ensuring they understand your fundamental values and life philosophy. Discuss what makes life meaningful to you, your fears about medical treatment, and your views on quality of life versus quantity. Share your thoughts on pain management, life support, and end-of-life care.
Specific Medical Preferences Be explicit about your healthcare preferences. Discuss scenarios like prolonged life support, feeding tubes, resuscitation attempts, and experimental treatments. While you can't predict every possible situation, covering broad categories of treatment helps your decision-maker understand your general approach to medical intervention.
Document Everything Create written records of your discussions and preferences. This might include an advance care directive, values statement, or personal letter to your substitute decision-maker. Written documentation provides clarity when emotions run high and memories become unreliable.
Regular Updates Your values and preferences may evolve over time, especially as you age or face health challenges. Schedule regular conversations with your substitute decision-maker to ensure they remain current with your thinking. Update your formal documentation accordingly.
Family Dynamics and Relationships Brief your decision-maker on family relationships and potential conflicts. If certain family members are likely to disagree with your choices, prepare your decision-maker for these challenges. Discuss how you want them to handle opposition and whether there are specific people whose opinions should be considered or disregarded.
Understanding the Decision-Making Framework
Substituted Judgment Standard Australian law generally requires substitute decision-makers to use a "substituted judgment" approach - making the decision you would have made if you were capable. This is fundamentally different from making decisions based on what the substitute decision-maker thinks is best for you.
Information Gathering Brief your decision-maker on what information they should seek when making healthcare decisions. They should understand their right to ask healthcare providers detailed questions about treatment options, risks, benefits, and alternatives. They need to be comfortable requesting second opinions when appropriate.
Consulting Others Discuss who your substitute decision-maker should consult when making decisions. This might include family members, close friends, religious advisors, or healthcare professionals who know you well. While the final decision rests with your appointed decision-maker, input from others who understand your values can be valuable.
Supporting Your Substitute Decision-Maker
Emotional Support Systems Recognize that serving as a substitute decision-maker can be emotionally taxing. Help your chosen person identify their own support systems and coping strategies. This might include counseling services, support groups, or trusted friends and family who can provide emotional support during difficult decisions.
Legal Protections Ensure your substitute decision-maker understands their legal protections. When they make decisions in good faith based on your known wishes and values, they are generally protected from legal challenges. However, they should also understand the limits of their authority and when they might need to seek legal or tribunal guidance.
Resource Availability Provide your substitute decision-maker with resources they might need, including contact information for your healthcare providers, copies of relevant medical records, and details about your health insurance and advance care planning documents. Consider creating a comprehensive information package they can access when needed.
Common Pitfalls to Avoid
Choosing Based on Convenience Don't simply choose the person who lives closest or seems most obvious. The geographic proximity is far less important than ensuring the person truly understands and will honor your wishes.
Avoiding Difficult Conversations Many people avoid detailed discussions about end-of-life preferences because they're uncomfortable or emotional. However, these conversations are essential for effective substitute decision-making.
Assuming Family Harmony Don't assume your substitute decision-maker will automatically receive support from other family members. Prepare them for potential conflicts and be clear about your expectations regarding family consultation.
Setting and Forgetting Appointing a substitute decision-maker isn't a one-time task. Regular review and updates are essential to ensure your arrangements remain appropriate and current.
Plan ahead with confidence — create your free Advance Care Plan in the Evaheld Legacy Vault to record your healthcare wishes, appoint decision-makers, and give your loved ones clarity, comfort, and peace of mind.
Moving Forward with Confidence
Choosing and briefing a substitute decision-maker is ultimately about ensuring your voice continues to be heard even when you can't speak for yourself. By carefully selecting someone who shares your values, providing them with comprehensive guidance, and maintaining open communication, you create a framework that honors your autonomy while supporting them in their important role.
The National Advance Care Planning Advisory Service provides ongoing support and resources for both individuals making these important decisions and those serving as substitute decision-makers. Remember, this process isn't about planning for the worst - it's about ensuring the best possible outcomes aligned with your values and preferences, regardless of what the future holds.
Taking the time to thoughtfully choose and properly brief your substitute decision-maker is one of the greatest gifts you can give both to yourself and to your loved ones. It provides peace of mind, reduces family conflict during stressful times, and ensures that your healthcare decisions truly reflect your personal values and wishes.
Future-Proof Your Family’s Story with the Evaheld Legacy Vault
Imagine a single, permanent home for your life's most precious layers: the laughter in your stories, the wisdom in your wishes, and the clarity of your care plans. The Evaheld Legacy Vault is that home—a guaranteed sanctuary for your legacy, designed to outlive the digital noise and ensure your voice is heard for generations.
This is more than storage; it's the one account your family will thank you for creating.
Take control of what matters most — set up your free Evaheld Legacy Vault to keep your stories, care wishes, and essential documents safe, organised, and instantly shareable with loved ones and advisers, for life.
Get Your Vault Running in Minutes with Charli, Your AI Legacy Preservation Assistant
Stop feeling overwhelmed. Charli is your proactive guide who simplifies every step—from setting up your vault and inviting family members to sending smart content requests and helping you articulate your stories. She doesn't just help you write; she helps you build, ensuring your entire legacy is preserved efficiently and authentically.
Your All-in-One Legacy Solution
- Preserve a Rich, Living History: Build a first-person narrative with video messages, audio recordings, legacy letters, and recipes—a digital heirloom where your wisdom and memories are kept safe and searchable.
- Co-Create in Family Rooms: Spark conversations and gather memories together in shared, collaborative spaces. It’s a living scrapbook that grows with every contribution from your family.
- Simplify Every Step with Charli, Your AI Legacy Preservation Assistant: From onboarding and inviting family to sending content requests and articulating your stories, Charli provides proactive guidance throughout your entire legacy-building journey—ensuring nothing is forgotten while keeping the process effortless.
- Honour Your Care Wishes: Complete your legally valid Digital Advance Care Directive with our intuitive tool. Grant loved ones and clinicians instant, secure access, ending frantic document searches for good.
- Grant Emergency Access in Seconds: Share or print your unique QR Emergency Access Card. A single scan gives first responders immediate access to your directives, enabling faster, better-aligned care when every second counts.
- Safeguard Every Essential Document: Consolidate your will, power of attorney, superannuation details, and more in one bank-grade encrypted vault. Your family will always find what they need, securely.
How to Secure Your Legacy in Minutes
- Start Your Free Vault: Claim your personal, secure space in under a minute. No cost, no commitment.
- Add Your People & Open Rooms: Invite family to shared Rooms to begin co-creating your story and sending content requests.
- Build Your Legacy: Use your built-in AI assistant to help capture memories and refine your messages. Upload documents and record your care wishes. Your voice, preserved forever.
Why Thousands Are Choosing Evaheld
By starting your free Evaheld Legacy Vault, you gain:
- A Living Time Capsule — preserve your family’s identity, values, and care choices in one lasting digital home.
- With Charli, Your AI Assistant, Preserving Your Story is Effortless
- Ease & Organisation — everything important, easily shared and always up to date.
- Peace of Mind for All Generations — loved ones know exactly what you wish, and where to find it.
- Free to Begin, Forever to Keep — create your vault now and secure lifetime access
Watch our Cofounder's Story to learn why we’re so passionate about Legacy Preservation and Advance Care Planning
The Best 3 Resources to Get Started
- Create Your Legacy Statement in 10 Minutes Flat
- Legacy Letters for Grandchildren
- Learn how to preserve your family legacy today—simple steps, meaningful impact, lasting connection.
Start Your Vault — It’s Free and Forever Yours
Building your Evaheld Legacy Vault takes minutes — and protects your stories, care plans, and family legacy for generations. Give your loved ones the greatest gift of all: peace of mind that never expires.
Create your free Evaheld Legacy Vault today — safeguard your memories, protect your wishes, and keep your story alive forever.
Our Promise: No One Left Behind
Evaheld’s “Connection Is All We Have” Hardship Policy ensures that financial barriers never silence a story. If you or someone you love needs assistance, we’ll help you secure your vault — because every life, every voice, and every legacy deserves to be remembered, honoured, and preserved.
Share this article





