I managed to get a free move out of my own stupidity a few years back.
Realised half way to the exam centre that I forgot to bring my logbook with the BAK pass in it. I knew they where going to check it for a CPL exam so I called to advise I wasn't going to attend the exam due to the time it would take me to drive back home and get it.
The call centre operator offered to ask the manager to which I initially said there was no point and I understand I need to repay the delivery fee but she would not take no for an answer.
I was on hold for a few minutes and was then advised I could rebook it for free.
I don't think I have ever had a negative experience with ASL