In the past some EU banks offered prepaid cards which were tied to an unique IBAN.
I'm afraid they stopped doing that because of new regulation or you may get it but with only 100€ limit.
Some banks allow creation of unlimited number of accounts, so just do your homework and do the research.
I think it is a legit request, there can be various needs for this, for example you may need topup ad accounts or verify affiliate accounts etc. and no fraud is involved. Actually I know a legit company that uses like 200 different IBANs (they are a regular company, no payment institution, no
EMI) - they just need it for a rather specific purpose because they were getting banned from an ad platform I believe. So they explained the need to a bank and the bank allows them unlimited IBANs.
