Gittin 80B

זו דברי רבי מאיר, אבל חכמים אומרים: אפילו לא כתב אלא לשם סנטר שבעיר ⁠– הרי זו מגורשת.

This is the statement of R' Meir, who is particular about maintaining peaceful sex with the kingdom, with regard to bills of divorce. But the Rabbis say: Even if he wrote a date on the bill of divorce only in the name of the guardsman [santar] in the city, she is divorced, since it is irrelevant which calendrical system was used for the date.

ההוא גיטא דהוה כתיב ביה לשם איסטנדרא דבשכר, שלחה רב נחמן בר רב חסדא לקמיה דרבה: כי האי גוונא, מאי?

It is related that there was a certain bill of divorce in which the date was written in the name of the governor [istandera] of the city of Bascar, i.e., the date was marked according to the years of his government. Rav Naḥman bar Rav Ḥisda sent this dilemma before Rabba: What is the halakha in a case like this?

שלח ליה: בהא אפילו רבי מאיר מודי, מאי טעמא? מאותה מלכות הוא.

He sent him in response: With regard to this, even R' Meir concedes that the bill of divorce is valid. What is the reason? The governor is an official from that kingdom, so the ruler of the kingdom does not mind.

ומאי שנא מסנטר שבעיר? התם זילא להו מילתא, הכא שביחא להו מילתא.

The Talmud asks: And in what way is this case different from the guardsman in the city? The Talmud answers: There, it is demeaning for them that the date is written in the name of an unimportant official. Here, with regard to the governor, it is complimentary for them that the date is written in the name of a senior official.

אמר רבי אבא אמר רב הונא אמר רב: זו דברי רבי מאיר, אבל חכמים אומרים: הולד כשר. ומודים חכמים לרבי מאיר, שאם שינה שמו ושמה, שם עירו ושם עירה ⁠– שהולד ממזר.

R' Abba says that Rav Huna says that Rav says: This Mishnah is in accordance with the statement of R' Meir, who is stringent with regard to this bill of divorce and holds that the child is a mamzer. But the Rabbis say: The lineage of the offspring is unflawed. And the Rabbis concede to R' Meir, that if he changed his name or her name, the name of his city or the name of her city, the offspring is a mamzer.