Is the biometric data used in voter identification at polling stations?

Costa Rica, TSE, Electoral Code (Law No. 8765): Electoral Act (as of 8-18-2016), accessed 3 February 2022

ARTICLE 177 - Attendance of voters
Every voter who turns up shall be asked for their full names. If the person is registered in the voters register, they shall be asked to show their identity card to check the number against which it appears in the aforementioned register. Once the identity of the voter has been verified, they shall sign beside their names, except if they are illiterate or otherwise incapable of doing so, in which case this shall be noted. They shall then be requested to enter the corresponding location to cast their vote according to the voting method established by the TSE.

The law simply states that voter identity is verified against the Electoral Register containing voters’ photographs that is provided to each polling station. The identification card, which contains biometric data, is used for reference.