1099s For Suppliers with No Tax Reporting Sites

I was curious if anyone else in the U.S. generates 1099s out of Oracle Payables for suppliers with no tax reporting site designated.

I realize that the Oracle procedures require each 1099 supplier to have a reporting site designated.  But my user insists that she cannot select one (esp. for suppliers with multiple pay sites in the operating unit -- which one should she pick?) and that she never has going back years to Release 11 and earlier.

The result: When Oracle R12 prepares a 1099 form for a supplier with no designated tax reporting site in the OU, the system appears to choose the supplier's first active site code alphabetically from the OU -- even if the site is a Purchasing only site!