How can eBay force buyers to come back to mark as received after they've got their items?   eBay send members feedback reminders regularly but it doesn't make all members leave feedbacks.   I think it's a good idea if all members do it but I can't see how it's possible foe eBay to force all to do so.

As an automatic thing it would not be forced but if the Buyer was too busy or just too lazy to click a button at least the Seller would then be aware and would have a legitimate reason to contact the Buyer and make sure everything is OK, As it stands if one of my Buyers doesn't leave FB I have no way of knowing if they received it etc.