Hi @saguaros,
Well, that's hard to say. As you can see, DT Register seems to not pass any info to Mollie in these cases. So as you can see, we see only the amount that the customer was willing to pay. We don't see who the customer was or what event he wanted to book.
So, these bookings are all not confirmed; the customer got as far as the checkout and for some reason got stuck (or decided not to book after all).