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This error means the name you're entering for a customer, vendor, or employee already exists somewhere in your QuickBooks Online account, even if it doesn't show up on the list you're looking at. It usually happens after importing data from QuickBooks Desktop, or after turning on payroll once employees were already added.
Here's how to track down the duplicate and clear the error.
Step 1: Search for the duplicate name
The customer, vendor, and employee lists don't always surface every match, especially inactive ones. A more reliable way to search across all three at once is through the check screen:
- Select + New, then select Check.
- In the Payee dropdown, type the name you're trying to add.
- Any matches will show up here, along with whether they're set up as a vendor, employee, or customer.
This method checks active and inactive records together, so it can catch a duplicate even after you've already confirmed the name isn't on your active employee, vendor, or customer list.
Step 2: Update the existing record
Once you find the duplicate, you have two options:
- Edit the name, for example by adding a middle initial or a number, so both records can stay active.
- Make the older record inactive if it's no longer in use.
To find and edit the record:
- Employees: go to All apps, then Payroll, then Employees.
- Vendors: go to All apps, then Expenses & Bills, then Vendors.
- Customers: go to All apps, then Customer Hub, then Customers & leads.
Step 3: Add the name again
Try adding your customer, vendor, or employee again. If you've checked for duplicates using the method above and the error still won't clear, reach out to QuickBooks support so they can look into your account directly.
For more info, see Fix "the Name Supplied Already Exists" error message in QuickBooks.
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