Thanks for the information.
In order to be eligible for a survivor benefit based on the earnings of an ex-spouse, you must have been married at least 10 years, at least 60 years old and not married at the time you make the application for the survivor benefit.
The fact that you are still married to him in the eyes of your church does not impact a social security benefit. Social security eligibility is based solely on legal marriage and legal divorce.
So, because you are remarried now, you will not be eligible for a survivor benefit based on your ex's earnings. However, in the future when he passes, if you are no longer married because of a death or divorce, then when your ex passes you would be entitled to file a survivor benefit claim with social security. The fact that he remarried (more than once) after your divorce will not prevent you from being eligible nor will you have to share the benefit with his widow.
And in fact, if both your ex and your present husband pass before you, you will be eligible to choose which of them you want a survivor benefit from---obviously the one that pays the most to you.
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I wish you and yours the best this holiday season,