On the 1099 form, the vendor's name appears as part of the street address
When you entered the vendor's name and address information in the New Vendor window, you changed the vendor's name after QuickBooks inserted the name into the Address block. For example, you may have entered the vendor's first name as “Jonathan” in the First Name field and shortened “Jonathan” to “Jon” in the Address block.
On the 1099 form, the vendor's name appears in an inappropriate format
When you entered the vendor's name and address information in the New Vendor window, you left the Company Name, First Name, M. I., and Last Name fields blank. When this is the case, QuickBooks assumes that what you entered in the Vendor field is how the vendor's name should appear on the form. For example, if you entered “Luxton, Brian” in the Vendor field because you have organized your Vendor list alphabetically by last name, QuickBooks prints “Luxton, Brian” on the 1099 form.