Does Facebook save IP address

Hey, im an informatic professional, lots of people always ask me about that, you cannot find the Ip adress, because Facebook privacity was fixed at May, 20 of 2010, but theres some steps on the internet to find the Ip i have try almost everything, but it Always appears some random Ip from u'r Friend List so it doesnt really works, if the person sends you an email you can find the ip but in facebook not.

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