Working conditions that prompt a resignation can include long hours, unpaid work, health hazards, and contract violations.
January 25, 2018
Dear (Employer Name),
I am submitting this letter as my formal resignation, effective (date), due to unsatisfactory working conditions. As I have repeatedly informed (HR/Contact Name), I have been asked to perform my job in unsafe conditions, including (example) and to step outside of my job description by (working long hours, working unpaid overtime, taking on unpaid responsibilities). Thank you for your understanding.