When your Facebook is full of a bunch of random friends, you lose control of who sees your information.....so you have to create a new Facebook account where in which you only add your "real friends."
Suzie Q. realized her boss was a friend on her Facebook account, so she couldn't put anything fun up so as not to dis-impress her boss. So, she became one of many to join the new trend of partaking in Facebook's Witness Relocation Program and made a new Facebook and put up all of her crazy pictures and only added her "real friends."
Your "relocation code" is the mysterious 4 numbers affixed by the USPS after the Zip Code of your mailing address. They are to be used for the forcible reconstruction of society into the New World Order according to the plans of the Shadow Government.
The Simpsons poked fun at the fouradditional digits of ZIP codes when Lisa asks what ZIP+4 codes are for, and is told that they are "citizen relocation codes".