2 - No, you can't use this temp PR card to sponsor your family. It only allows you to remain in Canada for your appeal case.
3 - If you think you may have a SIN but have lost your card, you need to visit a Service Canada office in person to request a replacement card with ID. A lawyer cannot do this on your behalf.
3 - If you think you may have a SIN but have lost your card, you need to visit a Service Canada office in person to request a replacement card with ID. A lawyer cannot do this on your behalf.