# Validate an address

Validates the format of an address for a card order. Make sure to follow country-specific address fields and validation as described in the card address validation guide.

For virtual cards, the address field will be used as a billing address. It will be used for AVS checks in countries where it is required.

For physical cards, the address field will be used as a delivery address. It will be used to deliver your card and for AVS checks in countries where it is required.

{% admonition type="warning" %}
We do not support PO BOX addresses.
{% /admonition %}

Endpoint: POST /v3/spend/address/validate
Security: UserToken

## Request fields (application/json):

  - `firstLine` (string)
    Card holder's address (max 30 characters).
    Example: "56 Shoreditch High St"

  - `secondLine` (string,null)
    Card holder's address (max 30 characters).
    Example: "The Tea Bldg"

  - `thirdLine` (string,null)
    Card holder's address (max 30 characters).

  - `city` (string)
    Card holder's city (max 30 characters).
    Example: "London"

  - `postCode` (string)
    Card holder's postal code (max 10 characters).
    Example: "E1 6JJ"

  - `state` (string,null)
    Card holder's state (max 30 characters).

  - `country` (string)
    Card holder's country (ISO 3166-1 alpha-2, max 2 characters).
    Example: "GB"

## Response 200 fields (application/json):

  - `errors` (array)
    Collection of validation errors. Empty if address is valid.

  - `errors.field` (string)
    The field that failed validation.
    Example: "postCode"

  - `errors.message` (string)
    Description of the validation error.
    Example: "Please enter a valid postcode"