The declarations referred to in Article R. 721-21 shall specify, for the purpose of identifying the accounts:
1° The name, address and identification codes of the institution managing the account or safe-deposit box (institution code, counter code);
2° The description of the account: customer’s International Bank Account Number (IBAN), type and characteristics;
3° The date and nature of the transaction declared: opening, closing or modification, specifying whether the transaction affects the account itself or its holder, and any duration of safe deposit box rental;
4° The number of holders.
The information is recorded electronically and kept indefinitely for accounts and safes opened and for one to eight days for closed accounts.