How do you stop your wife from receving your pension have been living separated lifes for 23 years?

To stop your wife from receiving your pension, you may need to consult a family law attorney to understand your rights and obligations regarding your pension and any potential division of assets due to your separation. If your separation has not been formalized through a legal divorce, you may need to file for divorce and negotiate a settlement. It's important to address any legal agreements or court orders that may apply to your situation. Keep in mind that laws vary by jurisdiction, so professional legal advice is crucial.