Resignation Letter Due to Family Reasons. Learn how to write a resignation letter due to family reasons with our stepbystep guide and sample letters.Here are two examples of letters resigning for family or personal reasons. The first is a formal business letter, and the second is an email sample. You've found a new job, but now you have to let your current employer know. Here are some examples of a good resignation letter to get you started. This article provides practical guidance on crafting a thoughtful resignation letter while maintaining a positive relationship with your employer. In the letter of resignation, leave your basic contact information in the header. One way to leave on good terms is to write a polite, professional resignation letter in which you thank your employer for your time at the company. If the situation is complex or you have multiple reasons for leaving, focus on the primary cause.