Remember, however, that if you want to transfer a large sum between banks in the European Union, you may be asked to provide certain details for statistical reasons.
Cofiwch, serch hynny, fod trothwyon yn amrywio o wlad i wlad: ar 1 Mai 1997, er enghraifft, ECU 2000 oedd y trothwy isaf i gael ei osod gan Aelod Wladwriaeth ac ECU 100006oeddyruchaf.