TLDR: Writing your own will feels simple until you realize a small mistake can leave your family stuck in court for months. Missing signatures, vague wording, and forgotten assets are the most common ways DIY wills fall apart. A little extra care now saves a lot of grief later.
Skipping the Witness Requirements
Most states require two witnesses to sign a will, and in some cases those witnesses can’t be people who stand to inherit anything. It sounds like a small detail. It isn’t. Courts have thrown out entire wills because a beneficiary signed as a witness, or because only one person witnessed the signing instead of two.
People also forget that witnesses need to actually watch you sign. Mailing someone a document to sign later doesn’t count in most places. If you’re writing your own will using a template you found online, double check your state’s specific witness rules before you do anything else. They’re not the same everywhere.
Being Too Vague About Who Gets What
“I leave my jewelry to my daughters” sounds clear enough until you have three daughters and one ring. Vague language is probably the single biggest reason wills end up disputed. People assume their intentions are obvious. Family members rarely agree on what obvious means once money and sentiment get involved.
Naming Specific Items Instead of Categories
Instead of writing “my personal belongings” or “my valuables,” name the actual items. Your father’s watch. The house at 214 Maple Street. The savings account at your credit union. Specificity doesn’t guarantee peace, but it removes a lot of the guesswork that turns siblings against each other.
Accounting for Contingencies
What happens if a beneficiary dies before you do? A surprising number of self-written wills don’t answer this question at all, which means a judge ends up deciding it instead. Naming a backup beneficiary for every major gift closes that gap.
Forgetting About Assets That Don’t Pass Through a Will
This one trips up almost everyone. Life insurance policies, retirement accounts, and jointly owned property usually pass to whoever is named as beneficiary on the account itself, not whoever is named in the will. If you wrote a will years ago and never updated your 401k beneficiary form after a divorce, your ex-spouse could still inherit that account no matter what your will says.
Take an inventory of every account you own and check who’s listed as beneficiary on each one. It takes twenty minutes and it might matter more than the will itself.
Not Updating the Will After Life Changes
A will written at 30 doesn’t always reflect life at 50. New kids, a second marriage, a business you started, a house you sold. People write a will once and treat it like a task they’ve checked off forever. It’s not. Divorce alone is one of the most common reasons old wills end up contested, especially when an ex-spouse is still named as executor or beneficiary and nobody thought to change it.
A Simple Habit That Prevents This
Pick a life event, like a birthday every five years, and use it as a reminder to pull out your will and reread it. Ten minutes of reading can catch a problem before it becomes a legal fight your family has to sort out without you.
Trying to Disinherit Someone Without Following the Rules
Cutting a child or spouse out of a will isn’t as simple as just leaving their name off the page. Many states have laws protecting spouses from being completely disinherited, and an omitted child can sometimes claim they were left out by accident rather than on purpose. If you actually intend to leave someone out, you usually need to state that intention clearly in the document itself, not just by silence.
This is one of the areas where a DIY will causes the most damage, because the mistake often isn’t discovered until after the person has passed and it’s too late to fix.
Getting the Legal Language Wrong
Wills use specific legal terms for a reason. Writing “I want” instead of “I direct” might not sound like a big deal, but courts sometimes interpret those phrases differently. A poorly worded clause can create ambiguity that a judge then has to interpret, which means your wishes get filtered through someone else’s guess at what you meant.
Writing your own will can absolutely work for simple, straightforward situations. But the mistakes that cause the most trouble are rarely the ones people are worried about while they’re writing it. They’re the small, boring details, a missing witness, an outdated beneficiary form, a sentence that sounded clear to you but confusing to everyone else. Getting a second set of eyes on the document, even just once, catches most of these before they become a problem for the people you’re trying to protect.
