As an adult you shouldn't need your mum to complain for you?
Basically at work I told a none disabled adult to move their car from the disabled bay as a disabled staff member needed it. I wasn't shouting or even raising my voice but I was firm in my instruction & said that the disabled person had made a complaint to me.
They did move their car but not before telling me that they were not happy with how I spoke to them & that they were unwell today & there was no other parking (this was untrue there was many spaces in the over flow).
Several hours later her mum called my manager and made a complaint that I had upset her adult daughter.
AIBU to think my organisation should not accept the mums complaint but ask the staff member to complain herself?