I will leave it to you all to decide if that may be the case
http://apne.tv/videos/details/Serials/85914/FINALLY!-Shivaay-To-Get-Married-To-Anika-|-Ishqbaa
Frankly I doubt this myself because when he has to put the sindoor and mangalsutra won't he see it is Annika not Tia?
He has to raise the veil to do that right?