FPSC will post the admit cards to the address mentioned in the form and if you have seen the form carefully, there was a page in the end in which eight columns of address were given. So when they will dispatch slips, they will paste the chip written by you on the envelope.
regards

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Mitta do apni hasti ko, agar kuch martaba chahiye,
k dana khak men mil kar gul-i-gulzar banta hai.