My brother convinced my mom to give him power of attorney—then cut me off. Can I fight this?

My brother convinced my mom to give him power of attorney—then cut me off. Can I fight this?


July 30, 2025 | Allison Robertson

My brother convinced my mom to give him power of attorney—then cut me off. Can I fight this?


Can You Challenge a Power of Attorney?

Your brother got your mom to sign over power of attorney, and now you’re completely cut off. No updates, no access, just silence. It feels wrong. This guide breaks down what power of attorney really means, when it can be challenged, and what you can do to protect your mom—and yourself.

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What is Power of Attorney?

Power of attorney (POA) gives someone the legal right to make decisions for another person. That could include handling money, making medical choices, or managing property. Your mom gave that authority to your brother. But it doesn’t mean he can do whatever he wants.

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Can He Legally Cut You Off?

If your mom knowingly and willingly gave him power of attorney, he technically doesn’t have to include you in decisions. But if he’s using that power to isolate her or take advantage, that could cross into abuse. That’s where things get legally messy.

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Start With Your Mom

Talk to her—if she’s mentally clear, she can revoke the POA at any time. Ask if she still wants your brother to have that role or if she felt pressured into it. Keep it calm and caring, not confrontational. Her wishes matter most here.

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Ask to See the POA Document

Try to get a copy of the actual document. It will show what kind of power your brother has and when it started. Some POAs only kick in if your mom becomes incapacitated, others start right away. You’ll need to know which type this is.

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Look for Warning Signs

Is your brother hiding info? Blocking visits? Making big financial decisions without telling anyone? Those are red flags. If your mom seems scared, confused, or suddenly cut off from others, that could mean something's not right.

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Document Everything

Write things down. Keep track of texts, calls, changes in behavior, or financial red flags. If this ever goes to court, your notes can help show a pattern. It also helps you stay clear-headed in a very emotional situation.

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What If Your Mom Was Pressured?

If she was tricked, guilted, or didn’t fully understand what she was signing, that could be "undue influence." Courts take this seriously. If there’s any doubt she acted on her own free will, it might be worth talking to a lawyer.

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What If She Wasn’t Mentally Capable?

If she didn’t understand what she was signing due to memory loss, dementia, or confusion, the POA might not be valid. A doctor’s evaluation from around the time she signed can help prove this.

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Talk to a Lawyer

You don’t need to commit to a lawsuit. Just talking to an elder law or estate lawyer can help you understand your options. They can look at the POA, explain what’s legal and what’s not, and help you figure out your next move.

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Can You Challenge It?

Yes—if you believe there was pressure, confusion, or abuse involved, you can go to court and challenge the POA. A judge can decide whether it should be canceled or changed. But you’ll need proof, so gather what you can.

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Is Guardianship an Option?

If your mom can’t manage her own care and your brother isn’t acting in her best interest, you could petition for guardianship. This puts decision-making power in someone else’s hands (maybe yours), but it’s a big process and not always simple.

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Prepare for Family Pushback

Challenging a POA can stir up a lot of drama. Be ready for your brother to push back or make accusations. Stay calm, stick to facts, and try not to take it personally. Keep your focus on what’s best for your mom.

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It’s About Your Mom, Not the Drama

Try to stay centered on what your mom wants and needs. That can get lost in the chaos. Even if you're upset with your brother, this isn’t about revenge—it’s about making sure your mom is safe and cared for.

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You’re Not Overreacting

If something feels off, it probably is. Power of attorney abuse happens more often than people think. You're not being dramatic for asking questions or stepping in. You're trying to protect someone you care about.

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Trust Your Gut

If this situation doesn’t feel right, follow that instinct. Start small—talk to your mom, look at the documents, and ask questions. If things still seem off, get help. You don’t have to do this alone.

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