diff --git a/src/XeroPHP/Models/Accounting/Overpayment.php b/src/XeroPHP/Models/Accounting/Overpayment.php
index 4aa30e5c..12f78d19 100644
--- a/src/XeroPHP/Models/Accounting/Overpayment.php
+++ b/src/XeroPHP/Models/Accounting/Overpayment.php
@@ -5,7 +5,7 @@
 use XeroPHP\Remote;
 
 use XeroPHP\Models\Accounting\BankTransaction\LineItem;
-use XeroPHP\Models\Accounting\CreditNote\Allocation;
+use XeroPHP\Models\Accounting\Overpayment\Allocation;
 
 class Overpayment extends Remote\Object {
 
@@ -172,7 +172,8 @@ public static function getAPIStem(){
     */
     public static function getSupportedMethods(){
         return array(
-            Remote\Request::METHOD_GET
+            Remote\Request::METHOD_GET,
+            Remote\Request::METHOD_PUT
         );
     }
 
@@ -204,7 +205,7 @@ public static function getProperties(){
             'OverpaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
             'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
             'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote\\Allocation', true),
+            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Overpayment\\Allocation', true),
             'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
         );
     }
diff --git a/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php b/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php
new file mode 100644
index 00000000..3cd66e54
--- /dev/null
+++ b/src/XeroPHP/Models/Accounting/Overpayment/Allocation.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace XeroPHP\Models\Accounting\Overpayment;
+
+use XeroPHP\Remote;
+
+use XeroPHP\Models\Accounting\Invoice;
+
+class Allocation extends Remote\Object {
+
+    /**
+     * the invoice the overpayment is being allocated against
+     *
+     * @property Invoice Invoice
+     */
+
+    /**
+     * the amount being applied to the invoice
+     *
+     * @property float AppliedAmount
+     */
+
+    /**
+     * the date the overpayment is applied YYYY-MM-DD (read-only). This will be the latter of the invoice
+     * date and the overpayment date.
+     *
+     * @property \DateTime Date
+     */
+
+
+
+    /*
+    * Get the resource uri of the class (Contacts) etc
+    *
+    * @return string
+    */
+    public static function getResourceURI(){
+        return null;
+    }
+
+
+    /*
+    * Get the root node name.  Just the unqualified classname
+    *
+    * @return string
+    */
+    public static function getRootNodeName(){
+        return 'Allocation';
+    }
+
+
+    /*
+    * Get the guid property
+    *
+    * @return string
+    */
+    public static function getGUIDProperty(){
+        return '';
+    }
+
+
+    /**
+    * Get the stem of the API (core.xro) etc
+    *
+    * @return string|null
+    */
+    public static function getAPIStem(){
+        return Remote\URL::API_CORE;
+    }
+
+
+    /*
+    * Get the supported methods
+    */
+    public static function getSupportedMethods(){
+        return array(
+        );
+    }
+
+    /**
+     *
+     * Get the properties of the object.  Indexed by constants
+     *  [0] - Mandatory
+     *  [1] - Type
+     *  [2] - PHP type
+     *  [3] - Is an Array
+     *
+     * @return array
+     */
+    public static function getProperties(){
+        return array(
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
+            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+        );
+    }
+
+
+    /**
+     * @return Invoice
+     */
+    public function getInvoice(){
+        return $this->_data['Invoice'];
+    }
+
+    /**
+     * @param Invoice $value
+     * @return Allocation
+     */
+    public function setInvoice(Invoice $value){
+        $this->propertyUpdated('Invoice', $value);
+        $this->_data['Invoice'] = $value;
+        return $this;
+    }
+
+    /**
+     * @return float
+     */
+    public function getAppliedAmount(){
+        return $this->_data['AppliedAmount'];
+    }
+
+    /**
+     * @param float $value
+     * @return Allocation
+     */
+    public function setAppliedAmount($value){
+        $this->propertyUpdated('AppliedAmount', $value);
+        $this->_data['AppliedAmount'] = $value;
+        return $this;
+    }
+
+    /**
+     * @return \DateTime
+     */
+    public function getDate(){
+        return $this->_data['Date'];
+    }
+
+    /**
+     * @param \DateTime $value
+     * @return Allocation
+     */
+    public function setDate(\DateTime $value){
+        $this->propertyUpdated('Date', $value);
+        $this->_data['Date'] = $value;
+        return $this;
+    }
+
+
+}
\ No newline at end of file
diff --git a/src/XeroPHP/Models/Accounting/Prepayment.php b/src/XeroPHP/Models/Accounting/Prepayment.php
index 853159b3..308cdcd2 100644
--- a/src/XeroPHP/Models/Accounting/Prepayment.php
+++ b/src/XeroPHP/Models/Accounting/Prepayment.php
@@ -5,7 +5,7 @@
 use XeroPHP\Remote;
 
 use XeroPHP\Models\Accounting\BankTransaction\LineItem;
-use XeroPHP\Models\Accounting\CreditNote\Allocation;
+use XeroPHP\Models\Accounting\Prepayment\Allocation;
 
 class Prepayment extends Remote\Object {
 
@@ -172,7 +172,8 @@ public static function getAPIStem(){
     */
     public static function getSupportedMethods(){
         return array(
-            Remote\Request::METHOD_GET
+            Remote\Request::METHOD_GET,
+            Remote\Request::METHOD_PUT
         );
     }
 
@@ -204,7 +205,7 @@ public static function getProperties(){
             'PrepaymentID' => array (false, self::PROPERTY_TYPE_STRING, null, false),
             'CurrencyRate' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
             'RemainingCredit' => array (false, self::PROPERTY_TYPE_STRING, null, false),
-            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\CreditNote\\Allocation', true),
+            'Allocations' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Prepayment\\Allocation', true),
             'HasAttachments' => array (false, self::PROPERTY_TYPE_BOOLEAN, null, false)
         );
     }
diff --git a/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php b/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php
new file mode 100644
index 00000000..b81ca522
--- /dev/null
+++ b/src/XeroPHP/Models/Accounting/Prepayment/Allocation.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace XeroPHP\Models\Accounting\Prepayment;
+
+use XeroPHP\Remote;
+
+use XeroPHP\Models\Accounting\Invoice;
+
+class Allocation extends Remote\Object {
+
+    /**
+     * the invoice the prepayment is being allocated against
+     *
+     * @property Invoice Invoice
+     */
+
+    /**
+     * the amount being applied to the invoice
+     *
+     * @property float AppliedAmount
+     */
+
+    /**
+     * the date the prepayment is applied YYYY-MM-DD (read-only). This will be the latter of the invoice
+     * date and the prepayment date.
+     *
+     * @property \DateTime Date
+     */
+
+
+
+    /*
+    * Get the resource uri of the class (Contacts) etc
+    *
+    * @return string
+    */
+    public static function getResourceURI(){
+        return null;
+    }
+
+
+    /*
+    * Get the root node name.  Just the unqualified classname
+    *
+    * @return string
+    */
+    public static function getRootNodeName(){
+        return 'Allocation';
+    }
+
+
+    /*
+    * Get the guid property
+    *
+    * @return string
+    */
+    public static function getGUIDProperty(){
+        return '';
+    }
+
+
+    /**
+    * Get the stem of the API (core.xro) etc
+    *
+    * @return string|null
+    */
+    public static function getAPIStem(){
+        return Remote\URL::API_CORE;
+    }
+
+
+    /*
+    * Get the supported methods
+    */
+    public static function getSupportedMethods(){
+        return array(
+        );
+    }
+
+    /**
+     *
+     * Get the properties of the object.  Indexed by constants
+     *  [0] - Mandatory
+     *  [1] - Type
+     *  [2] - PHP type
+     *  [3] - Is an Array
+     *
+     * @return array
+     */
+    public static function getProperties(){
+        return array(
+            'Invoice' => array (false, self::PROPERTY_TYPE_OBJECT, 'Accounting\\Invoice', false),
+            'AppliedAmount' => array (false, self::PROPERTY_TYPE_FLOAT, null, false),
+            'Date' => array (false, self::PROPERTY_TYPE_DATE, '\\DateTime', false)
+        );
+    }
+
+
+    /**
+     * @return Invoice
+     */
+    public function getInvoice(){
+        return $this->_data['Invoice'];
+    }
+
+    /**
+     * @param Invoice $value
+     * @return Allocation
+     */
+    public function setInvoice(Invoice $value){
+        $this->propertyUpdated('Invoice', $value);
+        $this->_data['Invoice'] = $value;
+        return $this;
+    }
+
+    /**
+     * @return float
+     */
+    public function getAppliedAmount(){
+        return $this->_data['AppliedAmount'];
+    }
+
+    /**
+     * @param float $value
+     * @return Allocation
+     */
+    public function setAppliedAmount($value){
+        $this->propertyUpdated('AppliedAmount', $value);
+        $this->_data['AppliedAmount'] = $value;
+        return $this;
+    }
+
+    /**
+     * @return \DateTime
+     */
+    public function getDate(){
+        return $this->_data['Date'];
+    }
+
+    /**
+     * @param \DateTime $value
+     * @return Allocation
+     */
+    public function setDate(\DateTime $value){
+        $this->propertyUpdated('Date', $value);
+        $this->_data['Date'] = $value;
+        return $this;
+    }
+
+
+}
\ No newline at end of file