Good news... here's my experience of the online visa extension
I arrived through Taftan border, planning to exit at Wagah border, I originally got a 30-days e-visa. French passport.
I was in Gilgit-Baltistan and no DC office there (Gilgit nor Skardu) is allowed to deliver visa extensions. So I went on Nadra website, it was quite straightforward but I remember I had to select "Individual (up to 6 months)" subcategory, as "less than 3 months" (my original e-visa belongs to this subcategory) was impossible to apply for. Don't pay attention and go for "up to 6 months", press the button and then it's fine, all your informations (from the original form) get automatically copied-pasted by the website so no need to fill it all over again, except the first page.
It got tricky with the documents to upload. Apparently, hotel booking was not enough and they asked me for a
sponsor letter from sponsor along with his/her CNIC on Rs:50 Rupees legal [page] for extension in visa attested by notary public
which was absolutely not understandable to me. And I was staying in a village where noone could really explain me what it meant.
Several times I uploaded secondhand documents, like a letter written by the guesthouse I was staying in, and stamped by the local DC office. But it was never enough, they sticked to the notary thing and kept on sending me emails entitled 'documents required' (I was turning mad!)
In the end... I lost hope and went back to Islamabad (hitch-hiking the KKH in November should be part of the Olympic Games seriously. Got loads of training now, I'm ready for a medal), ready to apply for an Indian visa before rushing to Wagah, shitty schedule, anyway - I arrived in Islamabad and got hosted by a couchsurfer who, from the beginning, knew what it was all about. On the next opening day (yesterday!) I got my 'notification of visa approval' (:
-they gave me 2 more months, as applied
-my visa extension
started on the day they granted it. But I must say that my original visa was already expired. Maybe if your visa hasn't expired yet, they would start your extension
on its expiring day, so you don't 'waste' any day? now idea. (What I know is that I gained a few legal days in the country, as my visa was expiring on Nov 13th and my visa extension
started on Nov 18th!)
-they seemed obviously very reluctant do deny my application. On the fourth 'documents required' email, the visa officer wrote
This application is being sent for last time review, if you could not able to provide the requisite document then this may result in your application being refused.
But new emails, review and 'documents required' followed that warning haha!
So, what is good to know about this damn "sponsor letter from sponsor along with his/her CNIC on Rs:50 Rupees legal [page] for extension
in visa attested by notary public":
-scan of each side of CNIC
-the letter has to be printed on a special 'legal' yellow paper, available at any notary office, then stamped by the notary. On top of this yellow paper is a big decorated rectangle, sort of banknote-looking, with the '50 Rupees' inscription in the middle. This is what you need to get.
Well, I guess I forgot a lot of details. Please ask for more!
Original visa validity: 6 months; visa duration: 30 days, single entry, from Taftan to Wagah.
Extended visa duration: 60 days, single-entry.