When an employer needs to decide between two very equal candidates, he almost always selects the one who sent a letter thanking him for the interview.

The obvious reason is that sending a letter is the polite thing to do. However the real reason is that a well-crafted letter is an additional opportunity to promote your candidacy. You can use it to reinforce why you are interested in the company and the job, why you are qualified, add something you forgot to say and take back something you wish you hadn't said.

Here is one format you might choose to adapt:

Employer's Name and Address

Dear use Mr./Ms. (instead of first name:)

Thank you for taking the time to meet with me yesterday. From what you have told me about the position, I am confident I can handle the job and I am excited about the opportunity of working for either the company or the individual.

I particularly like what you liked best about the job.

Please remember I have what they should like best about you for this job.

I forgot to mention if you need to add a selling point.

By the way, when I reviewed our discussion, I realized you may be under the mistaken impression that if you need to correct statements about experience, ability or salary.

I look forward to hearing from you soon.

Sincerely,

It is very important that your spelling, grammar, and punctuation are perfect. If this is not your strong area, have someone proofread your letter. Remember, don't rely on the spell check function of your word processor to catch every error. Most spell check functions will not identify words spelled correctly but not used properly. Try the grammar check function, it will check spelling, word use and grammar at the same time.

You will have to decide whether to send your letter by regular mail or email. Your decision should be based upon the immediacy with which a decision is likely to be reached and the degree of formality appropriate to the interviewer or the position.