Halakhah for Ketubot 1:2
בְּתוּלָה, כְּתֻבָּתָהּ מָאתַיִם. וְאַלְמָנָה, מָנֶה. בְּתוּלָה אַלְמָנָה, גְּרוּשָׁה, וַחֲלוּצָה, מִן הָאֵרוּסִין, כְּתֻבָּתָן מָאתַיִם, וְיֵשׁ לָהֶן טַעֲנַת בְּתוּלִים. הַגִּיּוֹרֶת, וְהַשְּׁבוּיָה, וְהַשִּׁפְחָה שֶׁנִּפְדּוּ וְשֶׁנִּתְגַּיְּרוּ, וְשֶׁנִּשְׁתַּחְרְרוּ, פְּחוּתוֹת מִבְּנוֹת שָׁלֹשׁ שָׁנִים וְיוֹם אֶחָד, כְּתֻבָּתָן מָאתַיִם, וְיֵשׁ לָהֶן טַעֲנַת בְּתוּלִים:
The kethubah of a virgin is two manah, and of a widow, one manah. A virgin who is a widow or a divorcée or a chalutzah from betrothal [and who remarried] — her kethubah [from the second] is two manah, and she is subject to a claim of virginity [i.e., if the second found her not to be a virgin, she loses her kethubah, it having been a "mistaken purchase"; for he had married her on the assumption that she was a virgin.] A proselyte, and a captive, and a bondsmaid, who had been redeemed and proselytized and freed (when they were) less than three years and one day old — their kethubah is two manah, and they are subject to a claim of virginity.