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.
Writing the words divorce is one of the metaphors of divorce in which divorce does not take place unless the husband intended it; for more benefit, please refer to Fatwa 90687.
If a husband repeats three times the words of divorce in one session to his wife with whom he did not consummate the marriage and the wording was not continuous, like if he separates between them with conjunction and the like, as in the above case, then the wife becomes irrevocably divorced with the first divorce, and the second and third divorce are not effective because the husband issued them to an alien (non-wife) woman and so they do not take effect.
Al-Hattaab from the Maaliki School of jurisprudence, said: “…..the word “continuous” here is to mean that if giving the three divorces is not continuous (i.e. without a separation between them), then it is considered only one divorce according to the agreement of the scholars, as she (the wife) became irrevocably divorced from him (the husband) with the first divorce, so the second divorce is not effective [does not take effect as she is no longer his wife].”
It should be noted that the jurists stated that if the husband is absent and he sent a letter of divorce to his wife, then divorce cannot be confirmed unless two witnesses testify that this is his writing; this is what Ibn Qudaamah stated in his book “Al-Mughni”.
Finally, we advise you to take the matter to an Islamic court as it is the judge who may investigate the matter whereas a Mufti is not able to do so.
Allaah Knows best.