A woman recently had a problem printing copies of her own pictures, because the shop thought they looked too professional.
However, on collecting them she found they had a note on them that said "Ask for Copyright release for the 2 pictures lying on the dryer rack."
The shop wouldn't hand over the snaps without proof she was the copyright holder.
As they were digital prints, there was no original film to prove she had taken them. Apparently the store helpfully suggested she could bring in the "digital media with the pictures on it".