. >> the phones have been ringing nonstop at this oklahoma census office. >> what's happening with it is, it's a mock of our form. >> scam artists have distributed bogus 2010 census forms across the nation in hopes of stealing valuable, personal information. in some cases, the criminals switched the real form with a fake one, so no one realizes the crime until it's too late. >> if they got a scam form, they never got the real one either. >> how can you tell if your census form isn't the real deal? >> the social security number. that is the biggest red flag that is out there. >> official paper will never ask you for your social security number, bank account information, or signature. the real forms also have a color background and ten questions. the bogus version typically has been black and white with 5 to 9 questions. officials are worried that this and other scams may scare people away from filling out the all important forms. the u.s. census only comes out once every decade. >> the more people are accurately counted by the census, the greater the likelihood that they and their neig

>> reporter: the phones have been ringing nonstop at this oklahoma census office, many fear they are ims of the latest census scam sphwhrits a mim ig, a mockive oh mock of or form. >> reporter: bonus forms have been distributed across the nation in hopes of stealing personal information. in many cases they switched the real form with the fake one so no one realizes the crime until it's too late. how can you tell if your census form isn't the real deal? >> the biggest absolutely the s the social security number. that's the biggest red flag. >> reporter: the official paper work will never ask you for your social security number, bank account information or signature. the real forms have a color background and ten questions. the bonus has been black and white with five to nine questions. >> officials are worried this and other scams may scare people away from signing the all important forms the u.s. census comes out once every decade. >> the more people are accurately counted by the census, the greater the likelihood that they and their neighbors will get benefits out of it. >> reporter: