All perfect praise be to Allaah, The Lord of the worlds. I testify that there is none worthy of worship except Allaah and that Muhammad is His slave and Messenger.
If this civil divorce was not accompanied by you verbally saying the words of divorce, then divorce did not take place. Also, writing the word divorce on paper is one of its metaphors, and it does not make divorce effective except with the husband's intention, as has already been clarified in fataawa 89894 and 84489.
Therefore, if you did not utter the word divorce to your wife, or if you wrote it without having the intention of divorcing her, then your wife is still married to you. Besides, just informing friends or others about the civil divorce does not make divorce effective.
Nevertheless, if the civil divorce is accompanied with a verbal utterance of the word divorce, then divorce does take place. Hence, if your wife is still in her waiting period, then you have the right to take her back without a new marriage contract. If her waiting period has expired, then it is not permissible for you to take her back, except with a new contract. Please, refer to fatwa 82541.
Taking back a wife is achieved through some matters that the jurists have outlined as in fatwa 89845.
Taking back your wife is not achieved just by promising that you will take her back or by saying that you love her, but if you told her, "You are my wife," while intending to take her back, then this is valid according to some scholars.
The Kuwaiti Fiqh Encyclopedia reads, "The Second Type: metaphors; namely: the terms that have the meaning of taking back a wife and have other meanings; such as saying, ‘You are to me as you were before,’ or, ‘You are my wife,’ and he intended to take her back, then this is valid."
Allaah knows best.