Here are some tips for writing a professional resignation acceptance letter: Keep the letter short. Keep your letter brief and to the point.California laws say that, in general, you are not required to give your employers two weeks notice – or any notice – prior to quitting or leaving a job. Leaving on short notice could jeopardize future employment if the former employer is listed as a reference and then contacted. When you work remotely or resign with short notice, however, you can send your resignation via email. Though employers who receive two weeks notice may be more likely to give you positive references in the future.