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Address Validation

Address Field Format

The Shippo API uses v1 field names for address components in most endpoints (including CreateShipment). Always use:

Field	Description	Example
name	Full name	Jane Smith
street1	Street address line 1	731 Market St
street2	Street address line 2 (optional)	Suite 200
city	City	San Francisco
state	State or province	CA
zip	Postal code	94103
country	ISO 3166-1 alpha-2 country code	US
email	Email (required for international senders)	jane@example.com
phone	Phone (required for international senders)	+1-555-123-4567

Note: CreateAddress and ValidateAddress take the v2 field names (address_line_1, city_locality, state_province, postal_code), but when passing addresses inline to CreateShipment, you must use the v1 names above.

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Validate a Structured Address

1. Collect at minimum: street1, city, state, zip, country (ISO 3166-1 alpha-2).
2. Call CreateAddress with the address fields. This creates the address and returns an object ID.
3. Call ValidateAddress with the address fields to get validation results. Note: this endpoint takes address fields as query parameters, not an object ID.
4. Check analysis.validation_result.value in the response. Values: "valid", "invalid", or "partially_valid" (address found with corrections applied). Check analysis.validation_result.reasons for details.
5. Report the standardized address back. Highlight any corrected fields (listed in changed_attributes). Note analysis.address_type ("residential", "commercial", or "unknown") -- residential classification affects carrier surcharges.
6. If invalid: relay the reason descriptions. If the API returns a recommended_address, present it to the user.
7. If partially_valid: show what was corrected and ask the user to confirm the corrections are acceptable.

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Parse a Freeform Address

1. Call ParseAddress with the raw string (e.g., "123 Main St, Springfield IL 62704").
2. Review the structured output for completeness. The parse response uses v2 field names: address_line_1, city_locality, state_province, postal_code.
3. Note: the parse response does not include country. You must ask the user for the country or infer it, then add it before proceeding.
4. Validate the parsed result by passing the fields to CreateAddress then ValidateAddress (follow the structured address workflow above from step 2).

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International Addresses

• Always require the country field. Do not guess.
• Pass non-Latin characters as-is; the API handles encoding.
• Validation depth varies by country. US, CA, GB, AU, and major EU countries have deep validation. Others may only confirm structural completeness. Inform the user of this limitation.

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Bulk Address Validation

There is no batch validation endpoint. Call CreateAddress per address. Track results (row number, valid/invalid, corrections, errors, residential classification) and report a summary when done. For 50+ addresses, set expectations about processing time and provide progress updates.

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Re-validate an Existing Address

Call ValidateAddress with the address fields. This endpoint validates by address fields, not by object ID.

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Duplicate Addresses

If CreateAddress returns a "Duplicate address" error, the address already exists in the account. Retrieve it via ListAddresses or proceed directly to validation.

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Quick Reference

Validate an address: CreateAddress (saves address) + ValidateAddress (validates with same fields)

Parse then validate: ParseAddress -> add country -> CreateAddress + ValidateAddress