Does the letter give any hints as to why they are sending it to you guys?
...as the previous filter was prone to coming off, due to either improper torquing or the vibrations of the Voodoo engine loosening it.
I would guess it was not improper torqueing but engine vibrations. Lot's of dynamic attenuation stuff done by the Ford engineers to keep the engine parts from shaking off the engine.
Oil filter torque, don't these things just require a dab of oil on the gasket and just hand tightening?
Yeah, even oil filters aren't as simple as they used to be.