Wa `alaykum as-Salamu wa rahmatullahi wa barakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
2- If one opts for other scenarios, it’s his personal choice as long as the conditions of valid marriage are met.
Responding to your question, Sheikh Kifah Mustapha, the Imam and Director of The Prayer Center of Orland Park and representative for Dar El Fatwa of Lebanon in the US, states:
A: It is Sunnah to see your future wife before you marry her as narrated to the Prophet (peace and blessings e upon him) when he told Al-Mughira Ibn Shu`bah to look at his would be wife to feel comfortable (At-Tirmidhi).
Talking to her is also part of the understanding in our culture now. If you choose to drop your right and the girl approves of that too, it should be fine.
B: If she was virgin, then the wali has to be a family member like father or brother or grandfather or uncle. Now if she was widowed or divorced, she can represent herself or assign the wali to whomever she wants. In many cases women feel comfortable to have the Imam represent them.
C: The appointment of representation must be by clear means verbal or written so the wali would know for exact as he is representing the women mentioned. Being shy should not prevent her from making such statement for things to be official.
D: Covering face should be fine if other means prove that woman’s name is the same written on marriage contract. For example; witnesses verify who she is or previous knowledge of voice and such. Being silent is only valid to her non-marriageable wali.
E: The duty of the wali ends after the contract is done. If he is a family member, then naturally people follow up. If he is not a family member, she can always invite Imam or other to help out in reconciliation or divorce
Almighty Allah knows best.