Write and send them a day or two following the interview – you want to be prompt with sending the thank you soon after the actual interview, but not overly eager. Thus, sending the thank you the day or two following the interview is ideal.
Keep the language clear, concise, and professional – It is important to think of the thank you letter as the final step in the interview process. You want to remain professional, conscientious, and personable.
Revise for grammar, punctuation and spelling – If the thank you letter is sent via email, always click spell check and re-read several times to ensure that the document is error-free. Similarly, with hard copies of thank you letters, review for grammar issues. It is a good idea to have a friend or spouse also review the letter prior to sending it.
Obtain the contact information of the company or person interviewing you – Always ask for a business card before leaving the interview. Most companies and HR managers have business cards that contain the necessary contact information. This will expedite the thank you letter process.