Answer:
by Ken Golliher: If your bank's position is that no cash was received, your bank is never going to file a CTR.
Answer:
by Brian Crow:
If you open the ATM and find the cash in a reject BIN, the CTR is the date the deposit was intended to be made. (The same answer would apply to a teller that miss keys an account number and accounting has to fix the transaction the next business day when working the unposted report.)