출처: http://www.uscis.gov/
How does a student covered under the cap gap extension obtain proof of continuing status?

The student should go to their Designated School Officer (DSO) with evidence of a timely filed H-1B petition (indicating a request for change of status rather than for consular processing), such as a copy of the petition and a FedEx, UPS, or USPS Express/certified mail receipt. The student’s DSO will issue a preliminary cap gap I-20 showing an extension until June 1st. If the student’s petitioning employer receives a notice of selection from USCIS, the student should return to his or her DSO with a copy of the receipt notice, if possible, for issuance of a new cap gap I-20 indicating the continued extension of status.