>>> IF YOU'VE BOUGHT A CAR RECENTLY, YOU MAY HAVE BEEN SURPRISED BY SOME OF THE FEES DEALERS CHARGE ON TOP OF THE STICKER PRICE. THEY'RE KNOWN AS JUNK FEES. AND NOW THE FEDERAL GOVERNMENT IS CRACKING DOWN. TOM COSTELLO NOW WITH OUR EXCLUSIVE REPORT. >> Reporter: IT'S A COMMON COMPLAINT. JUST WHEN YOU'RE ABOUT TO SIGN FOR THAT NEW CAR, IT SUDDENLY COSTS HUNDREDS, EVEN THOUSANDS OF DOLLARS MORE. STACEY LUPUL SAYS IT HAPPENED TO HER WHILE BUYING A CAR FOR HER SON. >> SOMEWHERE BETWEEN US SIGNING ON THE COMPUTER AND US WAITING IN THE LOBBY AND HAVING THE PAPERS PRINTED OUT, THEY ADDED THAT $4,000. >> Reporter: $4,000 FOR AN EXTENDED WARRANTY SHE SPECIFICALLY SAID SHE DIDN'T WANT. >> I ASKED THE QUESTIONS AND I WAS LIED TO. >> Reporter: THE FEDERAL TRADE COMMISSION SAYS IT RECEIVES 100,000 SIMILAR BAIT AND SWITCH COMPLAINTS EACH YEAR. CUSTOMERS CHARGED FOR UNWANTED PRODUCTS, SERVICES, AND HIT WITH SO-CALLED JUNK FEES. >> ALL TOO OFTEN, IT'S MEMBERS OF THE MILITARY AND ACTIVE SERVICE MEMBERS THAT ARE MOST TARGETED BY THESE PRACTICES. >> Reporter: TO TARGET THE SCAMS, THE FTC HAS A NEW CARS RULE REQUIRING DEALERS TO PROVIDE A VEHICLE'S ACTUAL PRICE AND COST, SPELLING OUT OPTIONAL ADD-ONES, AND PROHIBITING DEALERS FROM ADDING BOGUS ADD-ONES LIKE DUPLICATE WARRANTIES, OIL CHANGES ON EVs, OR UNWANTED SUBSCRIPTIONS. >> THIS RULE IS REALLY DESIGNED TO CREATE SOME HONESTY AND FAIR RULES OF THE ROAD SO THAT AMERICANS CAN BUY CARS WITHOUT WORRYING THAT THEY'RE GOING TO BE TRICK ORDER SCAMMED. >> Reporter: THE NATIONAL AUTOMOBILE DEALERS ASSOCIATION SAYS THE REGULATION IS HEAVY-HANDED BUREAUCRATIC OVERREACH AND REDUNDANCY AT ITS WORSE THAT WILL NEEDLESSLY LENGTHEN THE CAR BUYING PROCESS. AS FOR STACEY -- >> WILL YOU EVER GO BACK TO THAT CAR DEALERSHIP? >> NO, NEVER, EVER. IT'S AN AWFUL, AWFUL FEELING TO BE TAKEN ADVANTAGE OF LIKE THAT. >> Reporter: THE GOVERNMENT'S NEW CARS