Sometimes duplicate vendors get created with the same or similar names with slightly different spellings that you may want to remove the duplicates. Once transactions have been created on each they can't be deleted, but they can be merged together very easily. Here are the steps:
1. Open the duplicate Vendor you want to remove
2. Click the Merge option under the Save menu in the top left ribbon on that vendor
3. This will open the Merge window where you can select the vendor you want to merge this into
4. Click Merge button
The result is the duplicate vendor you opened will have all transactions and records associated with that vendor now pointed to the new vendor, the duplicate vendor will then be deleted, and the new vendor record will be opened on the screen.