Keep the acknowledgement with you. Resignation without notice at all - this can include walking off the job, job abandonment, and failure to return to work after a period of leave.Learn how to write a response to a resignation letter and use our examples and template to help you write your own. Submit the following documentation to Human Resources for inclusion in the employee's personnel file: 1. Resignation letter, if applicable; 2. Position upon returning to work, it will be considered a voluntary resignation. Notice Concerning the Undue Hardship Standard in Title VII Religious Accommodation Cases.