The following excerpt is from U.S. v. Glover, 514 F.2d 390 (9th Cir. 1975):
The situation here is readily distinguishable from that in United States v. Read, 465 F.2d 1118 (9th Cir. 1972). There the letter sent by the draft board to the person the registrant had listed as someone who would always know his address was returned marked "Address unknown".
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