US government: Your fingerprints have expired!

Karl mentioned to me that he’d gotten a letter from U.S. Citizenship and Immigration Services regarding his application for a visa for his wife, who lives in China. I gathered that a naturalized citizen applying for a visa for an alien must have his fingerprints on file with USCIS. Current fingerprints. USCIS had written to advise Karl that his fingerprints on file had expired.

Karl held up his hands to me and asked, “What expire? Fingerprints don’t expire!”