SpecLock

Customer approval, built for custom and made-to-order products

Collect one approval that covers the image or PDF proof, plus dimensions, material, color and personalization — with automatic protection if the order changes after your customer says yes.

• One proof, every detail.Customers approve the image or PDF proof alongside dimensions, material, color and custom text — all in a single link, no Shopify account needed.
• Protected after approval.If an order changes after the customer approves — a different quantity, a swapped variant — SpecLock flags it automatically and warns you before production starts.
• Proof of approval.Every approved file gets a SHA-256 checksum receipt, so you always have evidence of exactly what was approved if a dispute comes up.