Do I have to prove that my spouse is responsible for our marriage breakdown?
Under the Divorce Act, you do not need to prove that your spouse was at fault in order to get a divorce. If the reason you are asking for a divorce is marriage breakdown, shown by one year of living apart, either of you can request a divorce. It does not matter which one of you decided to leave. In fact, the law gives you the choice of applying to the court together to ask for a divorce.
However, if the reason you are asking for a divorce is marriage breakdown because of adultery or mental or physical cruelty, you will have to have proof of what happened.