The once “standard” stamp that students entering the U.S. would receive from Customs and Border patrol (CBP) on their I-120 / DS-2019 is now being discontinued. As of on or about August 10, 2012, CBP will no longer stamp the I-20 / DS-2019 form for any students re-entering the U.S., upon completion of their foreign travel.
If some agencies still require a stamped I-20, a student can make an appointment with their local USCIS office via an info pass system to obtain a stamp. In addition, a student encountering problems because their I-120 is not stamped can either call 1-703-603-3400 or send an email to SEVP@dhs.gov.
The above contact information was provided by the CBP website and the information was released on or about September 5, 2012 to the general public.