File §15 or combined §8 & §15 << TO WHAT EXTENT DOES THE OFFICE EXAMINE A CLAIM OF INCONTESTABILITY UNDER §15?
The USPTO neither examines the merits of §15 Declarations nor “accepts” §15 Declarations. However, the USPTO will review a §15 Declaration to determine whether it complies with statutory requirements. The USPTO will acknowledge receipt of only those §15 Declarations that meet all statutory requirements.