Final answer:
A job offer letter should be sent to a selected candidate immediately after the hiring decision is made.
Step-by-step explanation:
A job offer letter should be sent to a selected candidate immediately after the hiring decision is made. Once the employer has made the decision to hire a candidate, it is important to promptly notify the candidate and provide them with a written offer letter. This letter usually includes details such as the position, start date, salary, and any other terms and conditions of employment.