WHICH? magazine has warned Christmas shoppers to beware of Monday.
The consumer watchdog has branded tomorrow Cyber Monday.
They believe it could be the busiest day of the year for online shopping trips.
But shoppers could become the victim of fraudsters.
Which? technology editor Matt Bath said: While millions of people will shop online this Christmas without any problems, fraudsters will be taking advantage of those less savvy.
By taking a few simple steps, you can make yourself a less tempting target for these criminals, and ensure its only your Christmas that you are paying for this year.
The biggest fear is the theft of personal data such as credit card numbers.
Ensure you have a firewall switched on and anti-virus and anti-spyware installed.
If the offer looks too good to be true, it probably is.
Choose a reputable retailer such as a familiar high-street shop, or use an online directory such as http://www.safebuy.org.uk
which only list safe sites.
Find out how easy the company behind the website is to contact. Look for the physical address and telephone number, and try calling them.
Keep a record of the transaction and the order number. You should get a receipt emailed to you.
Pay for any purchases over £100 on a credit card. Your card company is then jointly liable for any problems. Visa Debit cards provide a similar service.http://www.sundaysun.co.uk/news/mr-justice-consumer-advice/2009/11/29/beware-cyber-monday-79310-25271916/