Suspect I'm pissing in the wind as this has gone on all of my life and doesn't look set to change any time soon.
Cashiers, till operators, retail staff. When I'm piled with bags and have my purse in one hand and have the other hand willing, nay eager to accept coins and notes in change - why do you put the note on my palm first and then pile coins on top? This makes it IMPOSSIBLE to tip the coins effectively, especially with a queue champing at the bit behind you.
Please. Coins in palm, notes offered to grasping fingers so it/they can be stowed first. I thengyou.