[KoryFerbet]

I am a recruiter and I wouldn't worry about a thank you letter. Honestly, I have only seen three candidates write thank you letters to one of our clients after an interview and in all three instances it actually hurt their chances of moving forward.

In fact two of the candidates were passed on simply because of what was in their letter, it didn't express enough of a desire to move forward and they seemed more like a resignation letter.

Be safe rather than sorry, and skip that unnecessary process.