You should send a thank you letter immediately after every job interview or informational interview (whether by phone or in person). This is an opportunity to express appreciation and confirm your interest in the position and the organization. You can also, if necessary, clarify any answers you gave in the interview. They should be sent to everyone that helps you in any way. If you are sending a thank you letter after an employment interview, mail it within 24 hours.

Tips on Writing Thank You Letters

• If you were interviewed by more than one person, send a thank you letter to the key hiring decision maker and to the person who coordinated the interview process.
• Personalize each letter, since the recipients are likely to discuss your candidacy together.
• In your letter to the coordinator of the interview, mention the names of those you met.
• Use plain, light-colored stationery.
• Although this is still a business letter, it may be more personal in tone.
• Mention the date you spoke with the person, and highlight a particularly useful piece of information you received or gave them.
• Keep your letter brief. Three short paragraphs are usually sufficient.