Within this category, cases like cheating involving e-commerce and credit-for-sex scams had a large increase.Crimes involving e-commerce have risen sharply over the past three years - from 238 reported cases in 2012 to 510 cases in 2013, and 1,659 cases last year.

A serial number on the back of the i Tunes card will let a user download music, movies, games or apps, according to the card's value.

She also told him she would meet him at 10pm near his place, as long as he bought the card for her.

The scams can also include the planting of sophisticated software on computers that sucks out all personal information. SMISHING So-called "smishing", or SMS plus "phishing", is a variant that thrives on the rising popularity of smartphones.

Scammers pose as banks or credit card companies to acquire personal details. LOTTERY Unexpected prize or lottery scams usually work by asking you to pay some sort of fee to claim your prize or winnings from a competition or lottery you never entered.

She then found a page on social network Facebook that did preorders for shoes, contact lenses, polaroid cameras and more.

Because she was in need of a supplier, she ordered more than 20 pairs of shoes with registered postage and paid over 0.

"I've learnt my lesson and the public needs to know the We Chat scam may seem unusual, but (there are people) out to harm us." Other victims have fallen prey to more conventional cheating scams.

In 2010, when she was 16, Regine started a blogshop.

Another reason for concern: The number of online scams is on the rise.

Police said commercial crimes increased by 1,387 cases in the first six months of this year compared with the same period in 2014.

Credit-for-sex scam cases jumped from five between July and September last year to 285 for the same period this year. Between July and December last year, there were 66 credit-for-sex scam cases.