Covers from Yancey are usually identified by a return address of a crewmember (figure 1), or rubber stamp (figure 1a) or the ship's straight line handstamp (figure 2) because of her post office having been closed as of September 1946. Most of the one-line cachets will be found in the vicinity of the postage stamp. During her stay at the Bay of Whales, mail was cancelled aboard the other ships of the Central Group (figures 3, 4).

Enroute north, some mail bearing the Highjump cachet was deposited at Dunedin, New Zealand (figure 5), Pago Pago, Samoa (figures 6, 7) and at Pearl Harbor, Hawaii (figures 8, 9). Only the corner card shown as figure 1a is known.