Fastrr COD
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PO Validator B2B
Enforce valid PO numbers at checkout. Built for B2B shops.
by byKlemm · Launched: June 2026 · Free plan available.
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About PO Validator B2B
B2B merchants must attach a Purchase Order number to every order, but Shopify provides no native way to enforce this. Buyers skip the PO field or enter invalid data, causing fulfillment delays and ERP mismatches. PO Validator solves this with server-side validation via Shopify Functions. Buyers cannot complete checkout without a valid PO number. Configure rules: required field, min/max length, mandatory prefix, regex patterns, allowed characters, and multilingual error messages.
Last verified: August 24, 2026 · Fresh
App details
- Developer
- byKlemm
- Category
- Marketing & conversion
- Pricing
- Free plan available
- Launched
- June 2026
- Rating
- 0.0 on Shopify
Key features
- Required PO field enforced at checkout
- Built-in errors in EN, DE, FR, and ES
- Everything in Free
- Minimum and maximum length validation
- Required prefix rule (e.g. "PO-")
3 plans · starts free · 7-day free trial
Free
Free
Starter
$4.99/month
Pro
$9.99/month
Plans and prices as listed on the Shopify App Store.
Ratings & reviews
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