The bank I worked for stopped issuing CDs 35 years ago. Instead, we used what amounted to a book-entry system. Customers received exactly the same rates and terms, and walked out of the branch with a piece of paper that looked very much like a true CD. In fact, the piece of paper was not a negotiable instrument, but rather a receipt for the time deposit. There's no requirement to retain true copies of receipts, and customers were free to lose those receipts just as often as they had misplaced real CDs! When the account matured, however, we didn't need the receipt in order to cash out or renew the deposit.
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...gone fishing.