אבן העזר קל״אEven HaEzer 131

Se’if 1א׳

צָרִיךְ שֶׁתִּהְיֶה כְּתִיבַת הַגֵּט וַחֲתִימָתוֹ לְשֵׁם הָאִישׁ הַמְגָרֵשׁ וּלְשֵׁם הָאִשָּׁה הַמִּתְגָּרֶשֶׁת. וְאִם לֹא נִכְתַּב לִשְׁמָהּ, אֵינוֹ גֵּט. כֵּיצַד, סוֹפֵר שֶׁכָּתַב גֵּט לְלַמֵּד אוֹ לְהִתְלַמֵּד, וּבָא הַבַּעַל וּמָצָא שֵׁם שֶׁנִּכְתַּב בְּגֵט זֶה כִּשְׁמוֹ, וְשֵׁם הָאִשָּׁה כְּשֵׁם אִשְׁתּוֹ, וְשֵׁם הָעִיר כְּשֵׁם עִירוֹ, וּנְטָלוֹ וְגֵרַשׁ בּוֹ, אֵינוֹ גֵּט:

The writing of a get (writ of divorce) and the signature of the witnesses must be in the name of (for the sake of) the divorcing man and the woman being divorced. If it was not written with this knowledge, the get is invalid. For example, a scribe who wrote a get to teach or for practice, and the husband came and found that the sample get had been written with his name, and the woman's name was the same as his wife's name, and the city was as his city; and he took the get and divorced his wife with the sample get, it is not a valid get.

Se’if 2ב׳

יֶתֶר עַל כֵּן, כָּתַב לְגָרֵשׁ אֶת אִשְׁתּוֹ, וְנִמְלַךְ, וּמְצָאוֹ בֶּן עִירוֹ וְאָמַר לוֹ: שְׁמִי כְּשִׁמְךָ וְשֵׁם אִשְׁתִּי כְּשֵׁם אִשְׁתְּךָ, וּנְטָלוֹ מִמֶּנּוּ וְגֵרַשׁ בּוֹ, אַף עַל פִּי שֶׁנִּכְתַּב לְשֵׁם גֵּרוּשִׁין, אֵינוֹ גֵּט:

In addition, if he wrote to divorce his wife and changed his mind, and a resident of his city found him and told him, "My name is as your name, and my wife's name is as your wife's name," and he (the second man) took the get and divorced his wife, even though this get was originally written to effect a divorce, the get is not valid.

Se’if 3ג׳

יֶתֶר עַל זֶה, מִי שֶׁיֵּשׁ לוֹ שְׁתֵּי נָשִׁים שֶׁשְּׁמוֹתֵיהֶם שָׁווֹת, וְכָתַב לְגָרֵשׁ אֶת הַגְּדוֹלָה, וְנִמְלַךְ, וְגֵרַשׁ בּוֹ אֶת הַקְּטַנָּה, אֵינוֹ גֵּט, שֶׁאַף עַל פִּי שֶׁנִּכְתַּב לְשֵׁם הָאִישׁ הַמְגָרֵשׁ, לֹא נִכְתַּב לְשֵׁם זוֹ שֶׁנִּתְגָּרְשָׁה בּוֹ:

Furthermore, a man who has two wives with identical names, and he wrote to divorce the elder, changed his mind, and used the get to divorce the younger woman, it is not a valid get, for even though it was written in the name of the divorcing man, it was not written for the purpose of divorcing the woman who received the divorce.