Additional Information Validation

Require customs and tax IDs for countries that need them on international orders.

Some countries require extra information on international parcels, such as a personal customs code or a tax ID. Without it, parcels can be held at customs or returned. This rule blocks checkout until the customer provides the ID for their shipping country.

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Supported IDs

Country	ID	What the rule checks
South Korea	Personal Customs Clearance Code (PCCC)	Required, and must be P followed by 12 digits, for example P123456789012.
Brazil	CPF / CNPJ	Required
Italy	Codice Fiscale / PEC	Required
China	Resident ID Number	Required
Mexico	RFC (Registro Federal de Contribuyentes)	Required

Each ID is only checked when the order ships to its country. For example, the PCCC is only required for orders shipped to South Korea. The message appears next to the Company field of the shipping address.

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How customers enter the ID

The rule reads the ID from a cart attribute, which is extra information saved with the cart. Your store needs a field on the cart page or at checkout that saves the ID under the exact key below:

Country	Cart attribute key
South Korea	KR_PCCC
Brazil	BR_CPF_CNPJ
Italy	IT_CODICE_FISCALE
China	CN_RESIDENT_ID
Mexico	MX_RFC

If your store doesn’t collect the ID under these keys, the rule blocks every order shipped to the selected countries. Set up the field first, then test the rule with the Testing status.

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Settings

Setting	Description
Countries	All countries, or only orders shipped to Specific countries. Each ID is already limited to its own country, so All countries is usually right.
Compliance Fields	Tick the IDs you want to require.
Message to display	What the customer sees. English is required. One message is used for every ID, so mention them in a general way.
Rule status	Active, Testing or Deactivated. See Rule status and testing.
Checkout behavior	See Common rule settings.

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Example message

Your country requires a customs or tax ID for this order. Please add it before you continue.