The letter of introduction is a personal communication ordinarily written by one person to another person for the purpose of bringing about the acquaintanceship of two persons not known to each other.
Example of Introduction Letter:
Dear Mr. Banzon:
The bearer of this letter, Mr. Elmer Andres, has several years been interested in organizing camps for boys who could afford to spend only a small amount of their summer vacations. As he is considering locations for camps in Ilocos Norte, I suggested that you were the man to help him, for you know every nook and corner of the province.
I shall be happy if you can assist Mr. Andres in any way. He is a fine young man and has a most worthwhile job on his hands.
Sincerely,
Ref: Effective Business Correspondence by Honesto F. Farol