I recently got F1 visa while my family got F2 stamped. Our initial plan was that my family will join me in Fall but due to initial settle down difficulty, we changed our plan that they will join a semester late or even after one year. When I told this change of plan to my US university, they told that the I20s issues to me and my family does not allow to travel at a later time and they must be issued a new dependent I-20. So I have few questions:
(1) Why can’t already issued I-20 can be used? I mean why not just a fresh travel signature will be enough for my dependnets instead of a fresh I20?
(2) If fresh I-20s are issued will it bear a new SEVIS ID? If so will it not be a problem because SEVID ID is printed on Visa as an annotation.
(3) Will my dependent need to go for fresh Visa interview in case they get new I-20s with new SEVIS IDs?