Witnesses

Q: Can my brother in law be regarded as a witness at my sister's nikaah while I, the brother be the wali?

Q: If a boy texts message a girl saying, "Do you accept me in nikkah" and the girl texts back,"yes" and then the boy texts, "same here", and during this there is no witness on the girl's side but the girl does not know if there were witnesses on the boy's side or not. Is the nikaah valid?

Q: While getting married to someone you need at least two witnesses one male and two females or two males and one female. What if someone gets married in secret without telling anyone and they make Allah their witness and say qabul?

I read somewhere that if a mature girl and boy says qabul with the intention of making her/him their spouses, they'll eventually become husband and wife in the eyes of Allah. Is it true?

One of my cousins secretly went into a relationship and she considers that guy as her husband. He also considers her as his wife. So with a pure heart are they married in the eyes of Allah?

Q: I did ijab o qbul without mehar and wali and without witness 8 years ago. There was no physical relation but I realized it is wrong. I left that boy now and my father is getting me married to my cousin. Should I get married to him or tell my father about the nikah 8 years ago?

Q: Can one get married without an Imaam and the partner male tells you, we can make nikaah as long as we know the duas. Is this permissible?

Q: If someone got married through the court and didn't fulfil the requirements for it to be an Islamic valid marriage, is this marriage still accepted in Islam?

The bride didn't have a wali due to her being the only Muslim but there also wasn't any male witnesses present during the ceremony.

Q: Is it permissible to make a marriage public via social media?

For example, since a marriage must be made public, can I post a photo of my spouse and me together on Instagram since I will then have more than two witnesses? Does that meet the condition of making marriage public, which the Prophet insisted upon?

Q: In my country, before the actual nikaah, the qadhi goes to the bride's house to get her signature. Some people insist that there should be 2 witnesses there and some say no since this is not an actual nikaah but just to confirm that the bride has given her permission.

What is the ruling here? Should there be 2 witnesses when the bride gives her approval at her house and they have to be present in the nikaah to confirm that OR the mere statement of a wali during the nikaah (that my daughter has given her approval) is taken to be sufficient without the involvement of any witness (to confirm the above)?

Q: I got married a year ago. Nikaah and everything took place but I never sign the certificate or recieve a certificate saying that I'm married. Am I married and how do I go about for faskh if I don't have a certificate?

Q: Please let me know if there is any role of witnesses after the nikaah ceremony has been performed and they have signed the nikah document as witnesses?