SIN – Application Form e-Services.ca » SIN » Form Select the scenario that best describes your situation. Select the scenario that best describes your situation:SelectYou are applying for yourselfYou are a parent applying on behalf of a minor or dependent adultYou are a legal guardian applying on behalf of a minor or dependent adultYou are a legal representative (court-appointed lawyer or individual) applying on behalf of someone elseYou are a provincial/territorial employee applying on behalf of someone for whom you have legal authorityYou are a legal representative of an estate requesting a confirmation of SIN for a deceased person