What is the ruling on repeating the marriage contract if it was done over the Internet?

Firstly:

If the marriage contract that was done over the Internet met all the necessary conditions, then it is a valid marriage. It is valid to do the marriage contract over the Internet so long as it meets all the necessary conditions. The senior scholars have issued fatwas stating that a marriage contract done over the telephone is valid, if we have verified the identity of the parties to the marriage contract and it fulfils the necessary conditions, namely the consent of the woman’s guardian (wali), two witnesses, and the proposal and acceptance. If a marriage contract done in this way is valid, then if it is done over the Internet, in which it is possible to verify the voice and the image directly, it is more appropriate that it should be valid.

See the fatwa of Shaykh Ibn Baz in question no. 2201 , and also question no. 297344 .

Secondly:

If the first marriage contract met the necessary conditions, then repeating it a second time will not invalidate the first marriage contract; rather it is by way of confirming it in front of the family, or for the purpose of documenting the first marriage contract. So the rulings on marriage will apply from the time of the first contract. Hence it is not valid to impose new conditions in it, or to stipulate a mahr (dowry) other than that which was agreed upon in the first contract. But if the first marriage contract did not meet the necessary conditions, then it is deemed invalid and a new marriage contract must be done with a new mahr, and it is permissible to stipulate new conditions in it.

And Allah knows best.