According to an explicit provision of the Law 4557/2018 (article 13) the income of a customer (individual or legal person) is verified by a bank on the basis of the recent administrative tax determination act.
If you wish to open a bank account, lease a safe deposit box, take out a loan or carry out other transactions (such as, for example, a credit transfer or wire transfer), the information that the law requires you to provide - whether you are the main beneficiary, co-beneficiary, primary debtor or guarantor - and the documents you will be asked to provide for their authentication, can be found by following the
link.
For foreign residents, the above documents certifying the data must be translated into Greek or English and certified by the Greek Embassy or the Greek Consulate or the Notary Public of the country in question or by an official Greek Public Authority.