A prospecting letter is, in short, a letter written to a company that is NOT act

A prospecting letter is, in short, a letter written to a company that is NOT actively searching for a candidate publicly. Pick a company you would like to work for and apply for a specific position. This company can be a local company such as a hospital near your home or it can be a national company, such as a S&P 500 Tech Firm. The position for which you are crafting this letter can be one that already exists or one that you would create if you could to match your unique blend of talents.
Please do NOT reply to a job posting as that is NOT a prospecting letter.
Address your letter to the correct person or office.