I had applied for the Visitor visa for me and my family to visit Canada for a week. I am currently in USA, on H1B. I have received a letter back from Canada Immigration saying "Client Information: Evidence of current legal status in the USA for yourself and all family memebers. This must be received at this office by....." I think I need to send them my approved H1B petition. Does anybody know if I need to provide the documents to them online via upload somewhere in my account, or do I need to physically mail photocopies?