[onionisafruit]

I’ve never seen a note in my zappos order. Have I been inadvertently throwing away these notes for years?

[milofeynman]

I haven't either. Is it possible it's a "this is a gift" option?

[marmshallow]

It seems so. According to their blog post about it, they're writing cards specific to the life event - birthday, get well, etc.

https://www.zappos.com/about/stories/pec-cards