PO Validator B2B

by byKlemm
Free plan available. Free trial available.

0.0 (0)

by byKlemm
0.0 (0)
on
Free plan available. Free trial available.

Enforce valid Purchase Order numbers at checkout for B2B orders. Block invalid POs with server-side validation to prevent fulfillment delays.

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About the PO Validator B2B

PO Validator B2B blocks checkout without a valid Purchase Order number, preventing invalid B2B orders before they reach your fulfillment team. This app uses server-side validation through Shopify Functions, so buyers cannot skip or bypass the PO field during checkout. Configure flexible validation rules to match your ERP requirements: set minimum and maximum length limits, require specific prefixes, validate against regex patterns for SAP and ERP number formats, and control allowed characters. You can block unwanted spaces and enforce exact PO formats that integrate with your backend systems. The app provides multilingual error messages in English, German, French, and Spanish out of the box. Stop fulfillment delays and ERP mismatches caused by missing or incorrect Purchase Order numbers on B2B orders.

Launched: June 8, 2026

Key features

Server-side checkout validation that buyers cannot skip or bypass
Flexible rules: length limits, required prefix, and regex for ERP formats
Character rules: whitelist allowed characters and block unwanted spaces
Regex rules: validate PO formats against ERP and SAP number patterns
Supports EN, DE, FR, and ES error messages out of the box

Integrations with:

Checkout

Category:

Checkout - Other Marketing and conversion

Pricing of PO Validator B2B

Free

Required PO field enforced at checkout
Built-in errors in EN, DE, FR, and ES

Starter

$4.99 / month

Everything in Free
Minimum and maximum length validation
Required prefix rule (e.g. "PO-")
Regex patterns for ERP and SAP formats

Free trial available

Pro

$9.99 / month

Everything in Starter
Character rules: whitelist, no spaces
Custom error messages per language
24/7 email support
Personal onboarding session
Custom feature requests welcome