Resignation Letter Due to Family Reasons. A resignation letter is a way to formally end your employment and provide details such as an end date and contact information.Download Pennsylvania Immediate Letter Of Resignation template, modify and send for signing using BoloForms Signature. "I received your request that I submit my resignation in writing. In the letter of resignation, leave your basic contact information in the header. You might simply say, "I was recently offered a new position" or, even more simply, "I am writing to confirm my resignation. To ensure a smooth transition, I am committed to assisting in the handover process. Add contact details, company name, and date. This means that you can quit at any time unless your employment contract says otherwise. Most importantly, what should be included in the resignation letter to an employer?