A thank you letter reminds the interviewer of you and puts you ahead of others who overlook sending a thank you letter. Always send a personalized thank you letter to everyone who interviewed you. Keep each thank you letter professional and simple (no more than one page).

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To follow are some more thank you letter tips:

A thank you letter also gives you the opportunity to highlight strengths and to elaborate on anything that you did not answer well during the interview.
Express your continued interest and enthusiasm for the position and the company & emphasize that you are looking forward to accepting the opportunity.
Tailor each thank you letter so the interviewer/ recruiter remembers who you are, which will help make you stand out.
Be genuine.
Thank you letters should be sent immediately after an interview, so make sure you mail or email the thank you letter so it is received before the hiring decision is made.
Obtain each interviewer’s business card at the interview, so you have their contact details for the thank you letter and for following up with the interviewers.

Also, a thank you letter is sometimes referred to as an interview thank you letter or referred to as an after interview thank you letter.

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