Thank You For Thank You For Reference Letter
Dear {Recipient},
I really appreciate the reference letter you wrote to {company name} on my behalf. I just came back from an interview with {HR/the owner of the company} and I'm confident I did well. I should hear back from them by {day of the week}.
Thank you so much for your strong endorsement. I'm sure your confidence in me helped me land the interview. I'll keep you posted on the outcome.
Sincerely,
{Your Name}