correcting information on registration or certificate 

You can send a request to the Office of the Registrar General for a registration amendment application form to change information on a marriage registration. The amended change will be reflected on any marriage certificate or certified copy of the marriage registration you apply for in the future. The marriage must be currently registered in Ontario to make a change. You can submit a request for a registration amendment form online or by phone, and the form will be mailed to you.