I've been sending items to FBA for about a year now and never had a single item go missing or not arrive.

A few weeks ago I decided to start paying Amazon to label my products because of the time spent on printing labels is just too long.

Ever since then, I'm getting emails every other day claiming that items are missing and that I should reply if I want the shipment investigated.

Why is this happening? I would have expected PAYING Amazon would actually mean my shipments are looked after and checked more than if I labelled them.

For example, in one shipment I have literally just sent 1 unit in 1 box. Amazon are claiming it's missing? It's been delivered to Amazon but they can't seem to "locate" the SKU? How? It's one item in one box, if they've received it, how can the item inside go "missing"? This has NEVER happened when I labelled items myself.

Unfortunately the system for printing labels to PDF, converting to JPG, dragging into my printer software, resizing and printing just takes too much time, especially as I often just sent one-off SKU's so I assumed paying Amazon for this service would be beneficial but items are going missing for some reason.