אורח חיים ק״חOrach Chayim 108

Se’if 1א׳

טָעָה אוֹ נֶאֱנַס וְלֹא הִתְפַּלֵּל שַׁחֲרִית, מִתְפַּלֵּל מִנְחָה שְׁתַּיִם: הָרִאשׁוֹנָה מִנְחָה, וְהַשְּׁנִיָּה לְתַשְׁלוּמִין; וְאִם הִפֵּךְ, לֹא יָצָא יְדֵי תְּפִלָּה שֶׁהִיא תַּשְׁלוּמִין, וְצָרִיךְ לַחֲזֹר וּלְהִתְפַּלֵּל אוֹתָהּ. וְכֵן הַדִּין בְּכָל מָקוֹם שֶׁצָּרִיךְ לְהִתְפַּלֵּל תְּפִלָּה לְתַשְׁלוּמִין.

One Who Did Not Pray Due To A Mistake, Or An Extenuating Circumstance, Or On Purpose. Containing 12 S'ifim If one erred or was forced [by circumstance] and did not pray the morning prayer, one should pray the afternoon prayer twice: the first is the afternoon prayer, and the second as a make-up. If one inverted [the order], one has not fulfilled one obligation in prayer for the prayer which is a make-up, and one needs to go back and pray it [again]. And the same law applies in every case in which one must pray a make-up prayer.

Se’if 2ב׳

טָעָה וְלֹא הִתְפַּלֵּל מִנְחָה, מִתְפַּלֵּל עַרְבִית שְׁתַּיִם: הָרִאשׁוֹנָה עַרְבִית, וְהַשְּׁנִיָּה לְתַשְׁלוּמִין; טָעָה וְלֹא הִתְפַּלֵּל עַרְבִית, מִתְפַּלֵּל שַׁחֲרִית שְׁתַּיִם: הָרִאשׁוֹנָה שַׁחֲרִית, וְהַבּ' לְתַשְׁלוּמִין. לְאַחַר שֶׁאוֹמֵר יוֹצֵר וְי"ח בְּרָכוֹת, יֹאמַר אַשְׁרֵי וְאַחַר כָּךְ יִתְפַּלֵּל י"ח לְתַשְׁלוּמֵי עַרְבִית. וְכֵן כְּשֶׁמִּתְפַּלֵּל עַרְבִית שְׁתַּיִם, מִשּׁוּם שֶׁלֹּא הִתְפַּלֵּל מִנְחָה, יֹאמַר אַשְׁרֵי בֵּין תְּפִלָּה לִתְפִלָּה (סְמַ"ק וְרִיבַ"שׁ סי' ק"מ).

If one erred and did not pray the afternoon prayer, one should pray the evening prayer twice: the first is for the evening prayer, and the second is for the make-up. If one erred and did not pray the evening prayer, one should pray the morning prayer (i.e. Amidah) twice: the first for the morning prayer, and the second as a make-up. After one says "Yotzeir" [the blessings of the Recitation of the Sh'ma in the morning prayer] and the Eighteen Blessings (i.e. the Amidah), one should say Ashrei and then afterwards pray the Eighteen Blessings for the make-up evening prayer. [And similarly, when one prays the evening prayer twice because one did not pray the afternoon prayer, one should say Ashrei between one prayer [i.e. Amidah] and [the other] prayer.] [Sefer Mitzvot Katan and the Rivash - Siman 140]

Se’if 3ג׳

הָא דְּמַשְׁלִים הַתְּפִלָּה שֶׁהִפְסִיד, דַּוְקָא בִּזְמַן תְּפִלָּה, אֲבָל בְּשָׁעָה שֶׁאֵין זְמַן תְּפִלָּה, לֹא.

[This statement] that one can complete [i.e. make-up] the [Amidah] prayer that one missed applies specifically during the time of [the next Amidah] prayer, but when it is not the time of [that next Amidah] prayer, one may not.