You want to give at least a two weeks' notice. "I am giving notice.I will be leaving to take other employment. Resignation letter effective immediately due to toxic environment. Briefly describe your experience. You can describe any negative experiences you've had that you feel are necessary to include. Use template Download PDF. Sample resignation letter due to toxic work environment. When resigning due to a toxic work environment, maintain professionalism. Use the unfair treatment resignation letter template when resigning because of negative experiences in the workplace, such as discrimination and bias.