number 4: fake tech support -- andrea hahn was browsing online when a voice came through her laptop saying it was infected. she called the number on the screen and... sot / andrea han, scam victim "and then they took control of the computer." number 3: those fake sweepstakes asking for a small fee to collect a prize number two: aggressive debt collectors impersonating authorities number one on the list: the i-r-s scam? still surging this holiday season? 2- thousand reports a day.. victims losing altogether a million dollars a month. sot / kevin lemon, scam victim "he said i'll be going to jail and agents would be coming to handcuff me and take me away." kevin lemon is one of them. engage...and never send money by wire or debit card. sot kevin lemon "i feel bad, very bad." gloria riviera abc news washington the food and drug administration just approved a new life saver.. injectable sponges that the manufacturer claims can stop bleeding in seconds. the sponge expands and can be used to control life-threatening wounds in areas where a tourniquet cannot be used, like the groin or the armpit.

andrea hahn was browsing online when a voice came through her laptop saying it was infected. she called the number on the screen and -- >> they took control of the computer. >> reporter: number three, those fake sweepstakes asking for a small fee to clect a prize. number two, aggressive debt collectors impersonating authorities. number one on the list, the irs scam. still surging this holiday season, 2,000 reports a day, victims losing altogether $1 >>>>e said i'll be going to jail and agents would be coming to handcuff me and take me away. >> reporter: kevin lemon is one of them. he lost $500. remember the basics. be wary of unsolicited communication, don't engage, and never send money by wire or debit card. >> it felt very bad, very bad. >> reporter: gloria riviera, abc news, washington. >> all right. we thank gloria for that report. >>> still ahead, it's one of the hottest gifts. so, why is amazon taking down certain kinds of hoverboards. some have caught fire. the new concerns with their batteries. >>> and later, spectacular holiday homes lighting up the night. but could

andrea hahn was browsing online when a voice came through her laptop saying it was infected. she called the number on the screen. >> they took control of the computer. >> reporter: she shut it off before the scammer stole her personal information. number 3, the fake sweepstakes asking for a small fee to collect a prize. number 2, aggressive debt collectors impersonating authorities. number 1 on the list, the irs scam. still surging this holiday season, 2,000 reports a day. million dollars a month. >> said i'd be going to jail and agents would be coming to handcuff me and take me away. >> reporter: kevin is one of them. he lost $500. to protect yourself, remember the basics. be weary of unsolicited communication. don't engage. and never send money by wire or debit card. >> felt very bad, very bad. >> reporter: gloria riviera, abc news, washington. >> good tips right there. still up for us, a homeless man and his christmas tree thrown no way. savor an egg mcmuffin any time you like. a fresh cracked egg, canadian bacon and an english muffin with real butter. >>> well, we started