Reference for Ketubot 202:6

ורב יהודה אומר אחת זו ואחת זו אשה ואינה אשה הכיר בה יש לה כתובה לא הכיר בה אין לה כתובה

Rav Judah said: Both this one and that one [sometimes have the status of] a wife and [sometimes] does not: If her husband knew of her [condition or status] she is entitled to a ketubah and if he was not aware of it she is not entitled to a ketubah.

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