diff --git a/includes/class-wc-validation.php b/includes/class-wc-validation.php
index 57afd384a82..48813e3a99b 100644
--- a/includes/class-wc-validation.php
+++ b/includes/class-wc-validation.php
@@ -16,9 +16,9 @@ if ( ! defined( 'ABSPATH' ) ) {
 class WC_Validation {
 
 	/**
-	 * Validates an email using wordpress native is_email function.
+	 * Validates an email using WordPress native is_email function.
 	 *
-	 * @param   string	email address
+	 * @param   string	$email Email address to validate.
 	 * @return  bool
 	 */
 	public static function is_email( $email ) {
@@ -28,7 +28,7 @@ class WC_Validation {
 	/**
 	 * Validates a phone number using a regular expression.
 	 *
-	 * @param   string	phone number
+	 * @param   string	$phone Phone number to validate.
 	 * @return  bool
 	 */
 	public static function is_phone( $phone ) {
@@ -42,8 +42,8 @@ class WC_Validation {
 	/**
 	 * Checks for a valid postcode.
 	 *
-	 * @param   string	postcode
-	 * @param	string	country
+	 * @param   string	$postcode Postcode to validate.
+	 * @param	string	$country Country to validate the postcode for.
 	 * @return  bool
 	 */
 	public static function is_postcode( $postcode, $country ) {
@@ -154,9 +154,9 @@ class WC_Validation {
 	/**
 	 * Format the postcode according to the country and length of the postcode.
 	 *
-	 * @param   string	postcode
-	 * @param	string	country
-	 * @return  string	formatted postcode
+	 * @param   string	$postcode Postcode to format.
+	 * @param	string	$country Country to format the postcode for.
+	 * @return  string	Formatted postcode.
 	 */
 	public static function format_postcode( $postcode, $country ) {
 		return wc_format_postcode( $postcode, $country );
@@ -165,8 +165,7 @@ class WC_Validation {
 	/**
 	 * format_phone function.
 	 *
-	 * @access public
-	 * @param mixed $tel
+	 * @param mixed $tel Phone number to format.
 	 * @return string
 	 */
 	public static function format_phone( $tel ) {