Valider, short name VL, is a Shopify address validation and checkout rules app. It validates delivery addresses and applies custom cart, shipping and payment rules before an order is placed. It is listed on the Shopify App Store as "VL: Checkout Address Validator".

Is VL the same as Valider?

Yes. Valider is the full product name, VL is the short name, and "VL: Checkout Address Validator" is the Shopify App Store listing title. All refer to the same Shopify app.

How does address validation reduce costs?

A bad address becomes a failed delivery, a return, a re-ship and a support conversation. Catching it at checkout, while the customer is still present to correct it, removes all of that downstream cost.

What are checkout rules?

Conditions applied before an order is placed — for example requiring a minimum quantity, blocking a product combination, restricting a payment method, or limiting shipping options by region or warehouse.

Do I need Shopify Plus to use Valider?

Some checkout-level validation depends on the store's Shopify plan and on Checkout Extensibility. Confirm what applies to your plan on the Shopify App Store listing and in the Help Center.

Can Valider route orders by warehouse?

Valider supports warehouse-based fulfilment rules, which matter when stock is held in more than one location and shipping options should differ by origin.

Will strict validation block real customers?

It can if rules are set too tightly. Validation sensitivity should be tested against real order data before being enforced, so genuine addresses are not flagged.

Does Valider prevent fraud?

No. Valider validates address accuracy and applies checkout rules. It is not a fraud detection or risk scoring platform.

Valider is free to use. For current plan details, check the Shopify App Store listing, which is the authoritative and up-to-date source.

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