A minor, but entertainingly frustrating episode.
I have a Sony A6600, and wanted to buy a Sony LCD Screen Protector.
There doesn't seem to be anything specific for the A6600, but there is for the A6000 - which I think has the same sized screen
https://centresdirect.co.uk/p-11986-sony-pcklm17-protect-semi-hard-sheet-for-ilce-6000.aspx
I emailed Sony to ask them a) which of their screen protectors I should use for the A6600, and b) was the A6000 suitable for the A6600.
They replied that the only correct one for the A6600 is this
https://support.d-imaging.sony.co.jp/www/cscs/accessories/compatibility.php?area=gb%E2%8C%A9=en&mdl=ILCE-6600&cat=38. I tried buying it from Sony, only to get a message to the effect that it is not available in the UK (and costs around £19 postage from USA [I can also get it from Japan on ebay - £20 postage). So I went back to the emails and pointed this out - and asked them what equivalent I should use in the UK - their response was that they didn't recommend 'third-party accessories' because they couldn't guarantee their 'correct functionality'. So I pointed out that I wasn't asking about third-party accessories - I was asking what part they recommended for someone in the UK. And furthermore - again asked specifically whether the part suiting the A6000 also did okay for the A6600 - and if not, why not.
They then wanted me to provide proof of purchase and a VAT receipt, plus retailer name, date, etc so that they could investigate the matter further!
I reminded them that I hadn't yet bought the part I was asking about, so had no proof of purchase - to which their response was that I had to provide this for the camera. I have asked them what on earth they need proof of purchase and a VAT receipt for a camera for, when my query is not about the camera.......
Meanwhile, I have purchased the A6000 screen protector for a nominal amount on ebay.