In most cases, you cannot directly buy life insurance for your ex-husband without his consent. Life insurance typically requires the insured person's consent and participation in the application process. As an ex-spouse, you generally don't have an insurable interest in your former spouse's life, which is a key requirement for purchasing life insurance on someone else's life.

However, if you have children together and there are court-ordered financial responsibilities or child support involved, you may have an insurable interest in ensuring that those obligations are met in case of your ex-husband's passing. In such situations, some jurisdictions may allow you to be the owner and beneficiary of a life insurance policy on your ex-husband, but he would still need to provide consent and, in some cases, undergo a medical examination.

The laws and regulations regarding life insurance and insurable interest vary depending on the country and state, so it's essential to consult with a qualified insurance agent or attorney to understand the specific rules and requirements in your jurisdiction. If your ex-husband is interested in getting life insurance coverage, he should apply for it himself to ensure that the process is legitimate and legal. Learn more about buying life insurance for your ex-husband.