You could begin describing conditions that got you a probation letter (immaturity, poor study habits, family issues, work hours, whatever). A probation period is necessary as it gives both the employer and the new employee ample time to see if they are right for the job.You can can add a probationary period to your employment contracts very simply with Legislate. Most employment verification letters usually just state that the party is employed, when employment started, type of position and possibly salary. Need help drafting a job offer letter? Through Online Job Offers, prospective employees can view, decline, accept and complete pending job offers. The probationary period is the final step in the examination and appointment process. Thank you for your interest in Kings County job opportunities! You can use this letter to provide an employee with written confirmation that his or her employment will continue beyond the probation period (if applicable). First off, a contract may outline a probationary period, in which the employer has the right to terminate employment without any notice.