Do I have to provide my birth number in my ISVP?

When submitting a project proposal, this information is not required, however, in the case of project funding, the birth number (or nationality if you have not been assigned a birth number - foreign national) is required for roles together/investigator, due to the transmission of data to the Central Project Register (IS VaVaI link here https://www.rvvi.cz/cep). You can enter your birth number or nationality in ISVP under "Personal settings" -> "Contact details".