Could there be a possibility of leak if its ten to fifteen years since vasectomy?

Yes, there is a possibility of sperm leakage years after a vasectomy, though it is relatively rare. Over time, the body may form new pathways for sperm, or the vas deferens may spontaneously reconnect. Additionally, if there was an incomplete vasectomy or if a reversal was performed, sperm could also be present. Regular post-vasectomy semen analyses can help confirm the absence of sperm.