I've been with the same employer for 18 years and in a commisioned sales role for the past 3 years. Prior to that in a salaried roles. At the end of Aug I had a discussion in regards to performance. On September 26 I was issued a letter from HR for non-performance stating that if a certain sales target is not met by Nov 30th I may be terminated for cause. Do I need to sign this letter? Also, would termination with cause result in severance. Thank you.