Here are some resources for writing a resignation letter (don’t ask): keeping it simple with just one sentence, being more verbose, but positively, and remembering not to burn any bridges. Also for your inspiration here is a scan of Richard Nixon’s to the point resignation letter, accepted and initialed by Henry Kissinger, and, from the other side, Nixon’s acceptance of the Commissioner of Social Security’s resignation. And, just for kicks, a resignation from adulthood.