Originally Posted by
jahason
If a Pakistani enters Pakistan on his Pakistani passport and leaves Pakistan, say, for UK on his British passport, the British passport will contain an exit stamp from Pakistan but no entry stamp. This is how the Indian Embassy staff recognises a dual citizen. I know of at least one person who was refused an Indian visa on his UK passport but offered one on his Pakistani passport (which happens to be much cheaper 65 pence vs 30 pounds at the time).
I don't understand how this is the case.
If you are a British-Pakistan dual national (Or indeed most other dual-nationals) it wouldn't work like that.
You'd leave Britain on your British passport. You'd enter Pakistan and then leave Pakistan on your Pakistani passport. Then you'd re-enter Britain on your British passport.
Therefore you'd have no stamps on your passport.
The same would apply for an Indian-British dual national (Though, technically I don't think India allows this).