I would like to inform you that I am quit my job. The reason behind this my study.Add contact details, company name, and date. I'm writing to inform you that I will resign from the position ______ (please specify your role or title). Your letter of resignation should be short and professional. Create a letter header. You don't have to send your resignation letter 30 days before the start of the school year, you have to send it 30 days before your planned last day. USC human resources experts share their tips for how to write a resignation letter and how to deliver it.