回複：求教:H1馬上要去墨西哥簽證,不知LCA和I-129是什麽

LCA is part of your H1B application document. It is required for H1B application. I-129 should refer to your H1B application form. So basically it askes for all the doc you used when your apply for H1B. Your attonery must have all these doc.

Good luck