PO Validator B2B

PO Validator B2B is a Shopify app in the Checkout - Other category. 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.

PO Validator B2B offers a free plan and 2 paid plans starting at $4/month and going up to $9.99/month. The free plan includes Required PO field enforced at checkout and Built-in errors in EN, DE, FR, and ES. The paid plans unlock advanced features beyond what's available on the free tier.

Yes — PO Validator B2B offers a free plan alongside paid options. The free plan includes Required PO field enforced at checkout and Built-in errors in EN, DE, FR, and ES. Paid plans start at $4/month for advanced features.

PO Validator B2B launched on June 8, 2026.

PO Validator B2B does not currently carry Shopify's Built for Shopify badge. The badge is awarded to apps that meet Shopify's published standards for performance, ease of use, and merchant value — many high-quality apps operate without it.

Merchants commonly compare PO Validator B2B with Payment Rules Hide PaymentHero, Magical Fee Surcharge + Tariff, EcoCart Green Protection, and Puco Checkout Rules. Each alternative covers a similar use case but differs on pricing model, integration depth, and the specific themes merchants praise in reviews — see the alternatives section above for a side-by-side.