This is a tricky question and can be answered multiple ways depending on the exact situation. In some instances a EV certificate can be issued to a DBA. For example in the UK Sole Proprietors cannot be issued EV certificates because there is no authority in the UK for registering Sole Proprietors. If there is a government authority that issues and has a public record for the DBA then you can use a DBA for a EV certificate. Otherwise they cannot be used.