

would need to be further defined if informed consent can only happen if you know and can verify the personal details of your potential partner. I doubt that is the scope of it and courts would rule that you consent to the act, not necessarily to the identity of your partner beyond what is apparent to you. This is different to for example getting married to an individual intending to mislead you.
Gotcha. Read up on that, if they would not have consented had they not been deceived seems to be the typical issue to rule on these cases.