回复：I-797是所有移民局发出的收据和批准通知的统称

Thanks, Xiao Bai tu. My company handled all of the H-1B application. I DIDn't get I-129 receipt notice的 I-797， And I only get original I-129 approval notice的 I-797. My company gave me the original I 129 approval notice's I 797 plus I 129 petition form and attached materials. Should I ask them for this I-129 receipt notice的 I-797 in the purpose of my visa application in Canada for retrance? Is this receipt notice very impormant to keep it?