Banks from the Czech Republic might consider SEPA transfers to an account in another country as a foreign or cross-border payment. As such, additional rules might apply to complete the transaction.
In particular, Raiffeisen CZ requires the counterparty address to be provided, similar to how it works in their online banking portal or in-person transfers at a branch office. You can find more details in this attachment.
For more information, please refer to Raiffeisen Payment Services.