What is the ruling on a marriage that took place under a pseudonym, given that the husband is considering divorcing the wife and marrying her under his real name?

For a marriage to be valid, both spouses must be specified by name, اشاره (gesture/indication), or description. If this specification occurs, and the contracting parties (groom and bride) are distinguished, and it is clear to the witnesses, then the contract is valid. It does not matter if an alias was used, as long as the groom is present and identified to the witnesses. It is not necessary to divorce the wife or perform a new contract, unless the old contract results in the loss of rights for the wife and children. However, there is no harm in performing a symbolic contract (a new contract) with the real name of the husband for a benefit or to avert a harm.