Is a marriage contract by proxy considered valid if the husband was not present, the dower was not mentioned, and the witnesses did not hear the agent's statement of acceptance of the marriage, even though both parties agreed?

This marriage is valid as long as both spouses have appointed someone who is eligible to be their proxy, and the proxy stands in the place of his principal in offering and acceptance. The presence of the principal is not obligatory. So, if the woman's guardian or his proxy says: "I marry you to my daughter so-and-so," the husband or his proxy says: "I accept." It is not a condition for the proxy to say, "I accept her for my principal," as long as he intends to accept her for his principal. As for what the questioner mentioned regarding the principal not stating anything from his speech or message, the intention behind it is unclear. However, a proxy is not allowed to overstep his authority.