I made a pick-up at the ATM, but no ticket was issued: here's what to do

A black box, recording all the operations carried out on the machine.
Surveillance cameras, which continuously film withdrawals and can prove that you have not received your money.
An automatic counting of the banknotes, which makes it possible to see whether a sum has been returned or not.
These arrangements allow the bank to confirm the error and make the refund if necessary.

Filing a formal claim
If your bank is slow to reimburse you or disputes the error, write a written claim with all the evidence collected. Address by registered mail with acknowledgement of receipt.

In this letter, please clarify:

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