To get that, right click on their profile, select ‘View Profile’ and then look for the name shown in blue rather than the one above it in black.
It'll be next to the word ’Skype’ and will have no spaces in it. Other ways to protect yourself online include not posting any personal information, such as you address, email address or mobile number on the internet.
It comes as the Met Police released worrying figures showing the number of sex crimes involving dating apps Tinder and Grindr was up 2,000 per cent this year.
The National Crime Agency and the National Police Chiefs' Council have launched a new campaign to advise those who have been, or are likely to be, targeted.
The NPCC said gangs were making millions from the scam, with thousands of victims too afraid to come forward.
It also said that children were among those exploited for sums ranging from £50 to £800.
In a similar scheme, but usually not with the aim of blackmail, "catfishing" is where an online user is tricked by another who pretends to be someone they are not in order to befriend, fool or entice.
The number of people reporting financially-motivated cyber enabled blackmails more than doubled from 385 in 2015 to 864 up to November 2016, police said. Four young men in the UK have killed themselves in the last year after being blackmailed by one of the cyber gangs.
Don't pay: Many victims who have paid have continued to get more demands for higher amounts of money.
The National Crime Agency said the victims are aged between 14 and 82, with the highest proportion being men aged between 21 and 30, and with a substantial proportion in the 11-20 age group.
It also added that the groups identified were working out of Morocco, the Philippines and the Ivory Coast.
It includes a film aimed at the most vulnerable victims, helping them to recognise a potential criminal approach and providing online advice, including the importance of reporting the crime to their local police.
Victims are often worried about reporting the offences to police because they are embarrassed, but they have offered the following advice: Dont panic: Contact your local police and internet service provider immediately.