This may be a waiver for a survivior benefit annuity. Were you awarded a portion of his pension or an immediate offset against other assets? If you got an immediate offset, the survivor annuity will not be needed, and since it reduces his benefits...that may be why they want you to waive it. DON"T sign anything until you have your attorney find out the facts. Social security benefits based on 50% of your ex husbands benefits are automatic if you were uninsured and married for at least 10 years and start when you turn 62 (assuming he is at least 62 as well) on a reduced basis (50% if you wait until you are 66)...as long as you are not remarried. These benefits don't cost him anything...and should not be waived!