Husband issuing talaaq without the knowledge of the wife
Q:
1. I would like to know is it permissible or accepted for a husband to divorce his wife without the knowledge of his wife?
2. Is the marriage of a couple valid even without witnesses just by signing a paper together without witness, wali and mahr?
3. The husband insists that it is between the couple and Allah and Allah is their witness, is this acceptable in any means?