These days, the majority of online commerce have the majority (if not all) of customer follow-up (particularly those of a positive nature) completely optional - there's no feedback, no process that obliges customers to take any action following purchase, although there are things like product and/or service reviews customers can submit if they wish, and of course systems for handling complaints.    There is a reason the process of online purchase is geared towards being as least convoluted for the customers as possible, so that is - ideally - purchase, receive, done. If you oblige customers to follow-up on little things that have no bearing or consequence on their side of things, the more hassle it seems to purchase on line, which could ultimately have an overall effect on all online trading, if customers perceive the process to contain a bunch of unnecessary, niggling hassles.    From the seller's perspective, there are loads of post-sale processes you either have to, or can opt to, take on board, and  a lot of them are designed to make the customer's role easier. These kinds of things can and do act as a selling point for a lot of companies. I understand why having a clear indication from the customer that an item was received would be attractive, but people will take action if they feel it's necessary or appropriate, and I don't just mean if there's a problem. If a buyer doesn't feel any follow-up action is necessary, odds are....no follow-up action is necessary on the seller's behalf, either, so all good in my book. 😉

Very well put however you are missing the point, Ebay is already very easy to use from a Buyers point of view (I also purchase on Ebay) so a simple click of a button is not going to turn anybody of. I as a Ebay Seller of 11+ years have had only maybe 4 or 5 Buyers that did not leave FB and have never had a complaint raised against me (knock on wood) but would have like to have known if they received the Item in 2 of the cases I contacted the Buyers via email to ask if all was OK the first was polite and said "Yes thank you all is good" the second not so, he said " I did not ask for nor did I subscribe to you're email list and if you contact me again I will take this matter up with Ebay themselves" so I don't contact my Buyers in this way any more, using the method I have described in my original post I would have legitimate reason to contact them simply stating I noticed you have not mark your Item as received yet and wanted to check if all was OK.