A "Thank You" note/letter after an interview is like gold to a recruiter or hiring manager. Even if you do not get the job it leaves a lasting impression that you valued the time the recruiter or hiring manager took to meet with you about the position. Unless you are working through a hiring manager many times a recruiter/agency cannot give out the address or e-mail of the manager. However, the recruiter/agency in most cases are more than happy to pass it on.
I believe if you send a hand written note versus an e-mail it means ten times more to the person receiving it. It means you actually took the time to sit down and handwrite a note to them. You can also let them know if you do not get the position you would like to be considered for other opportunities that become available.
When I was in human resources and recruiting I LOVED handwritten “Thank You” notes. They are far and few between because it is a lost art with the advent of e-mail so when I got one it sat on my desk next to my computer. That alone is worth the time it takes to write one because if a position comes up that you are qualified for your note will be remembered. That is priceless!
Let me know your thoughts in the comment section!