Since pensions are considered marital assets, they are subject to division in the same way other properties like a house, car, and land may be evaluated during a divorce. This means that even if your pension was not addressed during the divorce settlement or separation agreement, your ex-partner might still have a claim no matter how many years have passed.  However, once the divorce is finalized, it becomes more challenging for a party to reopen the settlement. In the case of pension division, if you did not apply for division of pension credits within 36 months of the marriage ending, your ex-wife may find it difficult to claim the credits, though it would not be entirely impossible. It's crucial to consult with a family lawyer to understand your situation and whether your ex-spouse has any legal grounds to claim your pension.