All F-1 visa holders planning to travel abroad and request reentry to the US must have a valid travel signature (endorsement) on their I-20 form.
In order for the signature to be considered "valid," it must be less than one year old (or, for those on OPT, less than six months old) at the time of your return to the US. To request a travel signature, please click on the button below to submit a Travel Signature request form in Populi.