Hello. Newbie alert! Apologies but having looked thru the forums I was unsure where to place this. I have evidence of price hiking if you use cashback websites to buy car insurance. I would say with some certainty this applies to other insurance based on my enquiries into the car insurance side of things. I have previously reported the companies to Topcashback before but it seems the practice remains rife. My own car insurance is due for renewal so have having shopped around using multiple comparison sites I narrowed down a couple of possibles I would look to purchase from. I very strictly used 2 different browsers, cleared all cookies and all previous quotes from within the comparisons sites, I then generated new quotes. At every stage I screenshot everything and strictly used the same details for every quote. Using a cashback site ensured without fail the same companies were £40 or so more expensive. I have again approached TCB for comment plus made the comparison sites themselves aware. I await their response. The last time I took this up with TCB they said traders they feature on their site are not allowed to do this. For example, today the Topcashback website says you can get £25 cashback if you click thru to Compare The Market and generate a brand new quote and buy the policy straight away. Doing that however is more expensive that going straight to Compare the Market and getting the quote without TCB. Despite caveat emptor and all that, using a cashback site implies that you will be better off because of cashback and using a comparison site - so who regulates them?