# Are Rabbeinu Tam's Tefillin really Rabbeinu Tam's Tefillin?

I once heard from a Sofer the shocking revelation that Rabbeinu Tam's Tefillin do not actually follow Rabbeinu Tam's opinion. Is that correct? Did I misunderstand? Are there any Soferim in our forum who are not only intimately familiar with how "Rabbeinu Tam Tefillin" are made, but also intimately familiar with Rabbeinu Tam's actual, written Shittah?

• @HodofHod, I'm afraid I don't have a good source for that. But it's true. :-) – msh210 Dec 29 '11 at 20:33