You found your great grandmother on FamilySearch. Her birth year is listed, her parents are linked, and there is even a photo attached. It feels like someone handed you a piece of your family for free.
Then you notice the birth year does not match the one your grandmother always told you. Or her parents are linked to a family that lived three states away and never once mentioned. Now you are left wondering the same thing thousands of people wonder every week: is FamilySearch even accurate, or did you just inherit someone else's mistake?
The honest answer is that FamilySearch is accurate in the way a busy small town is safe. Most of the time things work fine because most people are careful and most information gets checked. But it is a shared space, and shared spaces collect a few dents along the way.
Why FamilySearch Works the Way It Does
FamilySearch runs on a single global Family Tree instead of separate private trees for every user. When you look up an ancestor, you are not looking at "your" version of them. You are looking at the one shared profile that anyone researching that same person can also see and edit.
This setup is the whole reason FamilySearch is useful. The goal is one accurate profile for each person who has ever lived, connected to other profiles by correct relationships. When it works, a cousin in another state can add a document you never knew existed, and your tree improves without you doing anything.
But that same openness is also where the errors sneak in. FamilySearch openly acknowledges that sometimes well meaning users make changes that turn out to be incorrect. Someone might attach the wrong record because two ancestors shared a name and a birth year. Someone might merge two profiles that looked similar but were actually two different people. None of this happens out of malice. It happens because genealogy is detective work, and even good detectives sometimes follow the wrong lead.
The Most Common Ways Shared Trees Go Wrong
A few patterns show up again and again on FamilySearch, and knowing them will help you spot trouble before you build five more generations on top of it.
Duplicate Profiles
With over a billion names in the system, the same ancestor often gets entered more than once by different researchers who did not realize a profile already existed. Duplicate profiles cause confusion, lead to repeated research, and can even cause incorrect merges down the line. If you see two profiles for what looks like the same person with slightly different details, you have likely found a duplicate that needs to be merged carefully rather than ignored.
Incorrect Merges
Merging two duplicate profiles sounds like cleanup, but it can backfire. If two people merge profiles that actually represent different individuals, the result is a single record carrying facts that belong to two separate lives. This kind of mistake can sit unnoticed for years because the merged profile still looks complete and convincing.
Misattached Sources
A census record or marriage certificate gets attached to the wrong person because the names and dates were close enough to seem like a match. The source itself is real. It is just pointing at the wrong life.
Family Stories Treated as Settled Fact
Sometimes an error is not really an error at all. It is one branch of the family passing down a slightly different version of a story than another branch remembers, and whoever edited the profile first wrote down their version as if it were the only one.
How to Check Whether What You Are Seeing Is Accurate
Before you accept any fact on a shared profile, get in the habit of checking three things.
First, look at the sources attached to the profile. Trust in a collaborative tree is built largely on accuracy, and FamilySearch encourages users to add or change information only when they are confident it is correct and to always attach supporting sources. A date with no source behind it is a guess wearing a fact's clothing. A date backed by a birth certificate or census record has earned your trust.
Second, read the reason statement if one exists. A reason statement explains why someone made a particular change or contribution to an ancestor's record. This single sentence often tells you exactly what the previous contributor was thinking, which can save you from undoing a correct edit by mistake.
Third, check the change log. The Latest Changes panel on a person's page shows the history of edits made to that record, and you can click through to see the full list. This is the closest thing genealogy has to a paper trail. It shows you who changed what, when they changed it, and often why.
How to Fix an Error Without Starting a Family Feud
Finding a mistake is the easy part. Fixing it without offending a relative you have never met is the part that actually takes some care.
Start by assuming good intent. The person who made the error almost certainly believed they were helping. Treat the situation as a shared puzzle instead of a contest you need to win.
Use the discussion tool on the profile page before you change anything significant. This opens a conversation that anyone watching that ancestor's page can see, which means you are not quietly overwriting someone's work behind their back. A short, friendly note explaining what you found and why you believe it is correct goes a long way.
When you do make the change, always write a reason statement. This is not just good etiquette. Every change made in the Family Tree is archived, and mistakes are reversible, which means your correction becomes part of the permanent record too. If you are wrong, someone after you can fix it the same respectful way you just did.
If the error involves an incorrect merge, slow down even more. FamilySearch's merge analysis tool lets you see the vital details, sources, and relationships for both profiles side by side before and after the merge, along with the original contributions each profile started with. Review this carefully before undoing anything, because an incorrect undo can create just as much of a mess as the original bad merge did.
What This Means If You Are Building Your Own Family Record
Here is the part that genealogy forums rarely talk about. A shared tree like FamilySearch is brilliant for connecting names, dates, and documents across generations of strangers working together. But it was never built to hold the version of your family history that only you carry.
It cannot hold the sound of your grandmother's laugh when she told the same joke for the thirtieth time. It cannot hold the real reason your parents moved to a new city, the one they never wrote on any form. Those details live in memory, and memory does not show up in a census record.
That gap is exactly why so many families end up using FamilySearch and a personal memory archive side by side. One holds the documented facts about who came before you. The other holds the stories those people would have told you themselves if anyone had ever asked. Memoracy exists for that second part, a place where your own answers to simple daily prompts become a record as reliable as any source citation, because you are the source.
The Bottom Line
FamilySearch is accurate most of the time, and it gets more accurate every time someone checks a source, reads a change log, or writes a thoughtful reason statement instead of just clicking save. The errors that do show up are rarely signs of a broken system. They are signs of a system built by people, for people, with all the small misunderstandings that come with that.
The best thing you can do as a user is treat every profile the way you would want a stranger to treat your own grandmother's page. Check before you trust. Explain before you change. And remember that somewhere down the line, a relative you will never meet is going to read what you wrote and decide whether to trust it the same way you just decided whether to trust theirs.
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