woocommerce / woocommerce-gateway-stripe

		}

		// Check if postal code is valid format.

		if ( ! empty( $required_fields['billing_postcode'] ) ) {

			$country = isset( $required_fields['billing_country'] ) ? $required_fields['billing_country'] : WC()->customer->get_billing_country();

			$postcode = wc_format_postcode( $required_fields['billing_postcode'], $country );

			if ( '' !== $required_fields['billing_postcode'] && ! WC_Validation::is_postcode( $postcode, $country ) ) {

				$errors->add( 'validation', __( 'Please enter a valid billing postcode / ZIP.', 'woocommerce-gateway-stripe' ) );

			}

		}

		// Don't check this on add payment method page.

		if ( ( isset( $_POST['is_add_payment_page'] ) && 'no' === $_POST['is_add_payment_page'] ) ) {

			}

		}

		if ( WC()->cart->needs_shipping() && $validate_shipping_fields ) {

			// Check if postal code is valid format.

			if ( ! empty( $required_fields['shipping_postcode'] ) ) {

				$country = isset( $required_fields['shipping_country'] ) ? $required_fields['shipping_country'] : WC()->customer->get_shipping_country();

				$postcode = wc_format_postcode( $required_fields['shipping_postcode'], $country );

				if ( '' !== $required_fields['shipping_postcode'] && ! WC_Validation::is_postcode( $postcode, $country ) ) {

					$errors->add( 'validation', __( 'Please enter a valid shipping postcode / ZIP.', 'woocommerce-gateway-stripe' ) );

				}

			}

		}

		if ( WC()->cart->needs_shipping() ) {

			$shipping_country = WC()->customer->get_shipping_country();