Need help drafting a job offer letter? A sample letter offering a job contingent upon the results of a background check or other criteria.All employees hired to fill a regular job will be regarded as probationary employees for the first ninety (90) days. Hello All, I applied for the position, and I got selected as a candidate. Next subsection, if the position is based on a probationary period enter that period of time here. For example, you may enter 3 months or 30 days.