Reference for Gittin 4:2
בָּרִאשׁוֹנָה הָיָה עוֹשֶׂה בֵית דִּין בְּמָקוֹם אַחֵר וּמְבַטְּלוֹ. הִתְקִין רַבָּן גַּמְלִיאֵל הַזָּקֵן שֶׁלֹּא יְהוּ עוֹשִׂין כֵּן, מִפְּנֵי תִקּוּן הָעוֹלָם. בָּרִאשׁוֹנָה הָיָה מְשַׁנֶּה שְׁמוֹ וּשְׁמָהּ, שֵׁם עִירוֹ וְשֵׁם עִירָהּ. וְהִתְקִין רַבָּן גַּמְלִיאֵל הַזָּקֵן שֶׁיְּהֵא כוֹתֵב, אִישׁ פְּלוֹנִי וְכָל שֵׁם שֶׁיֵּשׁ לוֹ, אִשָּׁה פְלוֹנִית וְכָל שׁוּם שֶׁיֵּשׁ לָהּ, מִפְּנֵי תִקּוּן הָעוֹלָם:
In the beginning, he would convene a beth-din in a different place and void it. [He would void it not in the presence of the woman or of the messenger, but wherever he was, in the presence of three (a beth-din)]. R. Gamliel the elder instituted that they should not do so, for "the general good." [For the messenger, not aware (of the later revocation) would take it to her and she would remarry through it. And by the power of R. Gamliel's ordinance, stripes are administered to one who voids a get or protests it.] In the beginning, he would change his name and her name, the name of his city and the name of her city. [If he had two names, one here and one abroad, he would divorce her by the name in the place of the get and not take care to write both.] R. Gamliel the elder instituted that he write "this and this man and every (other) name that he has"; "this and this woman and every (other) name that she has," for "the general good." [so that her children by her second husband not be brought into disrepute, viz.: "Her husband did not divorce her; this is not his name." And if a man is known by two names, one in the place of the writing (of the get) and another in the place of the delivery, she is not divorced until both be written. But if he were known by two (different) names in one place, and only one of them were written — if it were done, it is valid, but ab initio, both should be written. And if he changed his name or her name in the get, even if he wrote afterwards: "and any other name that I have," the get is void.]