ASSALAMUALAIKUM WA RAHMATULLAH WA BARKATUHU,
I REQUEST TO CLEAR THE BELOW POINT IN THE LIGHT OF SHARAH ON MOST URGENT BASIS:
ON WHATSAPP HUSBAND AND WIFE WAS CHATTING DURING CHATTING THE HUSBAND WRITTEN TO WIFE ONE TIME ONLY
I DIVORCE YOU NOW ON
DOES DIVORCE STAND (APPLY).
PLEASE REPLY PROMPTLY.
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
In the above mentioned case, one talaq occurred on your wife. You have right to take her back during the iddah period (3 menses) only. If the iddat is over and you want to take her back then it is necessary to do nikah.
And Allah knows best
Darul Uloom Waqf Deoband