Below is my detailed experience with a راشی custom official:
I ordered a GTX750Ti* for my Dell 990 MT and its invoice was 8,000 rupees with free shipping from China Air Mail. According to FBR Tariff; I was supposed to pay only 3% i.e Rs.240 but the man at customs said that I'm 'supposed' to pay Rs.3,000 otherwise my shipment will be confiscated.
At first; I played dumb. I falsely claimed that I order stuff all the time from AliExpress (Total lie!) and never been charged that much before. And get this; this guy started uttering lies after lies about how the new government has enhanced taxes and how things are about to get a lot expensive and blah blah blah and I should feel lucky that I'm "only" paying 3,000 rupees for an f-ing 8,000 rupee component.
I cursed him with every abuse known to mankind, inside my head of course! I get real angry real fast when people start throwing bull $h!t right at my face, as if I'm some big dumb f--k.
Anyways, that's when I whipped out the print of the import tariff from my pocket and told him that I'm supposed to pay only 250 for the shipment. That set him back a bit; but then he said that these are old tariffs, irrelevant under new government so I told him to show me the new tariff, but he replied that I have find it on the internet MYSELF!
How can I possibly find something on the internet that doesn't exist?! And... Just what the fk are you doing at the custom office if you don't even have import tariff?
I offered him 500 rupees, over TWICE as much but nothing. And that's when I played my Ace Card. I told him that you're clearly asking for bribery from me which I'm not going to do on account of my faith but he didn't budge. So I told him that I'd like to meet his supervisor but like always; he lied and said that he's on leave.
Then I took my phone out of my pocket; told him that I've been recording** this conversation all along and my uncle, a high court lawyer*** would REALLY love to hear the recording and that he should give me his Job I.D and N.I.C number to proceed the legal matter.
Bingo!
That cracked him. He got scared while at the same time REAL angry. Grabbed 500 rupees from me, shoved the box in my hands and told me to get lost!
So that's EXACTLY what I did!
*https://goo.gl/37dXmh
**No, I wasn't recording. 
***My lawyer uncle doesn't exist! 
An interesting experience, nonetheless!