Is it permissible for a husband to take back his wife after he divorced her verbally twice, then divorced her in writing a third time following a threat concerning a trust receipt?

If you uttered a clear divorce pronouncement (ṭalāq ṣarīḥ) or wrote it with the intention of effecting divorce, and the third divorce occurred, then your wife has become irrevocably separated from you (bāʾinat baynūna kubrā). She cannot return to you unless she marries another man, he consummates the marriage with her, then divorces her, and her waiting period ('iddah) expires.

However, if the divorce occurred under considerable duress (such as an unjust threat of imprisonment), then the divorce is not effective.

And if you did not utter the divorce but only wrote it without the intention of effecting divorce, or if someone else wrote it and you signed it, then this divorce is not effective.

It is advisable to present the matter to trustworthy scholars in the questioner's country.