I was apalled to learn of two families who live on our development who were (until recently) living in Spain and claiming benefits.
They re visited UK around every 6 months for interviews about their claims. They apparently used relatives’ addresses for residence/postal purposes. I understand that one family has now gone back to UK and one, has had benefits withdrawn on being “found out”.
Having dealt with many cases of benefit fraud at one stage of my career – I am not surprised that this is happening and suspect it may be happening in places other than the Costas.