Send a proof, get it signed off on spelling, colors and placement, and keep a record of exactly which artwork was approved for production.
Drop in the artwork as a PDF, JPG or PNG. Each revision is preserved as its own version.
Your client opens it on any device — no login — and reviews spelling, colors, placement and dimensions.
They approve or request changes with a comment. You get a record of the exact file approved.
Typical review checklist