Photocopy is fine. Go to USCIS's website and they have a section to tell you all the docs they may need. I remember all the support docs can be photocopy. Good luck!
ask any immigration lawyer on the street you will find out... or call the USCIS 800 number. I AM DONE WITH YOU. 都说你是错到。亲属关系绿卡是交复印件。 【 在 wzmcolt (stud) 的大作中提到: 】