Why can't my friend transfer her marriage visa to her new passport before it expires?

Just get a new passport now.

I recommend getting a new passport before the stamp. I went in Oct to get my marriage non o extended then went back to transfer the stamp. Passport needs to be valid

Visa or extension ?

You can only get an extension until the valid date of your passport.

You need to get a new passport before you apply.

We normally don't do "asking for a friend" but I'll answer this post so she knows the answer.

When you apply for a long term (one year) extension you need a passport valid as long as the extension you'll get

OTHERWISE you only get the extension up to the expiration of your passport and when you do renew the passport you have to apply for a whole new yearly extension again.

When she gets the new passport they WILL move the year extension stamp to the new one BUT they won't give any more time because of the rule you can only get an extension up to the validity of the current passport 😕

SO if she applies on this passport (expiring in June) for an extension in March but , she's going to get an extension until then, after that she'll get a new passport and apply for a whole new year extension >

OR

She gets a new passport NOW and then can apply for the year like normal