diff --git a/lib/Model/PaymentBillingDetails.php b/lib/Model/PaymentBillingDetails.php
index 4675cee..ecbddca 100644
--- a/lib/Model/PaymentBillingDetails.php
+++ b/lib/Model/PaymentBillingDetails.php
@@ -247,7 +247,7 @@ public function getName()
     /**
      * Sets name
      *
-     * @param string|null $name The customer’s billing full name.
+     * @param string|null $name The customer's billing full name.
      *
      * @return self
      */
@@ -271,7 +271,7 @@ public function getEmail()
     /**
      * Sets email
      *
-     * @param string|null $email The customer’s billing email address.
+     * @param string|null $email The customer's billing email address.
      *
      * @return self
      */
@@ -295,7 +295,7 @@ public function getPhone()
     /**
      * Sets phone
      *
-     * @param string|null $phone The customer’s billing phone number.
+     * @param string|null $phone The customer's billing phone number in E.164 format.
      *
      * @return self
      */
diff --git a/lib/Model/PaymentCustomer.php b/lib/Model/PaymentCustomer.php
index 5c4d11d..aae6bf7 100644
--- a/lib/Model/PaymentCustomer.php
+++ b/lib/Model/PaymentCustomer.php
@@ -228,7 +228,7 @@ public function getEmail()
     /**
      * Sets email
      *
-     * @param string|null $email The customer’s email address.
+     * @param string|null $email The customer's email address.
      *
      * @return self
      */
@@ -252,7 +252,7 @@ public function getName()
     /**
      * Sets name
      *
-     * @param string|null $name The customer’s full name or business name.
+     * @param string|null $name The customer's full name or business name.
      *
      * @return self
      */
@@ -276,7 +276,7 @@ public function getPhone()
     /**
      * Sets phone
      *
-     * @param string|null $phone The customer’s phone number.
+     * @param string|null $phone The customer's phone number in E.164 format.
      *
      * @return self
      */
diff --git a/lib/Model/PaymentPaymentMethodBizum.php b/lib/Model/PaymentPaymentMethodBizum.php
index 3fa669d..54bbffb 100644
--- a/lib/Model/PaymentPaymentMethodBizum.php
+++ b/lib/Model/PaymentPaymentMethodBizum.php
@@ -217,7 +217,7 @@ public function getPhoneNumber()
     /**
      * Sets phone_number
      *
-     * @param string|null $phone_number The phone number used to pay with `bizum`.
+     * @param string|null $phone_number Phone number in E.164 format used to pay with `bizum`.
      *
      * @return self
      */
diff --git a/lib/Model/PaymentPaymentMethodBizumInput.php b/lib/Model/PaymentPaymentMethodBizumInput.php
index 610853c..117d867 100644
--- a/lib/Model/PaymentPaymentMethodBizumInput.php
+++ b/lib/Model/PaymentPaymentMethodBizumInput.php
@@ -217,7 +217,7 @@ public function getPhoneNumber()
     /**
      * Sets phone_number
      *
-     * @param string|null $phone_number The phone number used to pay with `bizum`.
+     * @param string|null $phone_number Phone number in E.164 format used to pay with `bizum`.
      *
      * @return self
      */
diff --git a/lib/Model/PaymentPaymentMethodMbway.php b/lib/Model/PaymentPaymentMethodMbway.php
index 2b0d7eb..25ccd7c 100644
--- a/lib/Model/PaymentPaymentMethodMbway.php
+++ b/lib/Model/PaymentPaymentMethodMbway.php
@@ -217,7 +217,7 @@ public function getPhoneNumber()
     /**
      * Sets phone_number
      *
-     * @param string|null $phone_number The phone number used to pay with `mbway`.
+     * @param string|null $phone_number Phone number in E.164 format used to pay with `mbway`.
      *
      * @return self
      */
diff --git a/lib/Model/PaymentShippingDetails.php b/lib/Model/PaymentShippingDetails.php
index e92c346..1d2d030 100644
--- a/lib/Model/PaymentShippingDetails.php
+++ b/lib/Model/PaymentShippingDetails.php
@@ -247,7 +247,7 @@ public function getName()
     /**
      * Sets name
      *
-     * @param string|null $name The shipping customer’s full name.
+     * @param string|null $name The shipping customer's full name.
      *
      * @return self
      */
@@ -271,7 +271,7 @@ public function getEmail()
     /**
      * Sets email
      *
-     * @param string|null $email The shipping customer’s email address.
+     * @param string|null $email The shipping customer's email address.
      *
      * @return self
      */
@@ -295,7 +295,7 @@ public function getPhone()
     /**
      * Sets phone
      *
-     * @param string|null $phone The shipping customer’s phone number.
+     * @param string|null $phone The shipping customer's phone number in E.164 format.
      *
      * @return self
      */