I think this means the file is returned to the place where it originated, i.e. the court that passed the original decision.

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Note added at 2 days17 hrs (2017-09-22 08:30:17 GMT)
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Yes, this is a legal term. Please refer to examples of its use, such as:

“DAVA : Görevliye etkin direnme suçundan sanık Ö. B.'ın 765 Sayılı T.C.K.nın 258/1-3 ve 81/1-3 üncü maddeleri uyarınca 2 ay 1 gün hapis cezasıyla cezalandırılmasına ilişkin, Gemlik Asliye Ceza Mahkemesince verilen 25.5.2004 gün ve 152-509 Sayılı hüküm sanık müdafii tarafından temyiz edilmiş, Yargıtay C.Başsavcılığınca 4.7.2005 gün ve 199341 sayıyla 5320 Sayılı Kanunun 8. maddesi uyannca lehe yasa değerlendirilmesi yapılmak üzere dosya mahalline iade edilmiştir.”

http://www.ankahukuk.com/public/index.php/icerik/dava-zamana...

This refers to a file being returned by a higher court to the first-instance court that passed the original decision.


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Note added at 2 days19 hrs (2017-09-22 10:27:42 GMT)
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The expression: "Refer the case back to the original court" is used in English legal documents, as in the following example:

"As the case is referred back to the original court that convicted him, Lord Black’s lawyers are expected to argue that the fraud convictions be thrown out."

http://www.nationalpost.com/m/obstruction justice conviction...

and this may also be a suitable way of rendering it.