precaution, safeguard, guard (noun)
a precautionary measure warding off impending danger or damage or injury etc.
"he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down"
safe-conduct, safeguard (verb)
a document or escort providing safe passage through a region especially in time of war
bill of lading, waybill (noun)
a receipt given by the carrier to the shipper acknowledging receipt of the goods being shipped and specifying the terms of delivery
an athlete who has earned a letter in a school sport