We don't put stickers on any panel that is existing. Don't want the blame for somebody else's mistakes. People don't generally read the sticker until they have trouble, which will be blamed on the company whose sticker is on the panel.
On new panels we use a panel schedule that has the company logo & contact info printed at the top.
Existing panels get a generic, anonymous panel schedule.
I remember the '60s, even went to San Fransisco to check it out, & I'm thankful to have enough brain cells left to....oops, I forgot.
