Three people have been arrested by Sussex Police as part of Operation Henhouse, the national intensification into fraud and asset recovery.
One investigation related to the theft of high-value items and bank cards stolen from the home address of a vulnerable 90-year-old man.
These were taken after the victim was befriended at a pub in Burgess Hill.
Enquiries are ongoing to determine whether there are any more suspects.
A 48-year-old man was arrested on suspicion of fraud by false representation, theft and burglary and has been released on police bail with conditions until May 26.
Another investigation was in relation to ‘time fraud’, which cost a business at Gatwick Airport more than £14,000.
It has been reported that one person had been claiming that another person which was known to them had been working when they had not been.
This is reported to have taken place across six-months.
A 49-year-old man was arrested on two counts of fraud by false representation and one count of theft.
A 55-year-old woman was arrested on suspicion of fraud by false representation.
Both the man and woman have been released on police bail until April 27 while enquiries continue.
Sussex Police has a wealth of information and prevention advice available about fraud on the force website.
If you or the person you are concerned about is vulnerable, you can visit the Op Signature page.