diff --git a/integration_test.go b/integration_test.go
index 900fa41..bc3a573 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -229,6 +229,67 @@ func TestGetPayments(t *testing.T) {
 	}
 }
 
+func TestPatchPayment(t *testing.T) {
+	c, _ := NewClient(testClientID, testSecret, APIBaseSandBox)
+	c.GetAccessToken()
+
+	p := Payment{
+		Intent: "sale",
+		Payer: &Payer{
+			PaymentMethod: "paypal",
+		},
+		Transactions: []Transaction{{
+			Amount: &Amount{
+				Currency: "USD",
+				Total:    "10.00", // total cost including shipping
+				Details: Details{
+					Shipping: "3.00", // total shipping cost
+					Subtotal: "7.00", // total cost without shipping
+				},
+			},
+			Description: "My Payment",
+			ItemList: &ItemList{
+				Items: []Item{
+					Item{
+						Quantity: 2,
+						Price:    "3.50",
+						Currency: "USD",
+						Name:     "Product 1",
+					},
+				},
+			},
+			Custom: "First value",
+		}},
+		RedirectURLs: &RedirectURLs{
+			ReturnURL: "http://..",
+			CancelURL: "http://..",
+		},
+	}
+	NewPayment, err := c.CreatePayment(p)
+	if err != nil {
+		t.Errorf("Unexpected error %v", err)
+	}
+	PaymentID := NewPayment.ID
+	pp := []PaymentPatch{
+		{
+			Operation: "replace",
+			Path:      "/transactions/0/custom",
+			Value:     "Replaced Value",
+		},
+	}
+	RevisedPayment, errpp := c.PatchPayment(PaymentID, pp)
+	if errpp != nil {
+		t.Errorf("Unexpected error when patching %v", errpp)
+	}
+	if RevisedPayment.Transactions != nil &&
+		len(RevisedPayment.Transactions) > 0 &&
+		RevisedPayment.Transactions[0].Custom != "" {
+		if RevisedPayment.Transactions[0].Custom != "Replaced Value" {
+			t.Errorf("Patched payment value failed to be patched %v", RevisedPayment.Transactions[0].Custom)
+		}
+	}
+}
+
 func TestExecuteApprovedPayment(t *testing.T) {
 	c, _ := NewClient(testClientID, testSecret, APIBaseSandBox)
 	c.GetAccessToken()
diff --git a/payment.go b/payment.go
index a87a497..8bd95ec 100644
--- a/payment.go
+++ b/payment.go
@@ -111,6 +111,23 @@ func (c *Client) GetPayment(paymentID string) (*Payment, error) {
 	return &p, nil
 }
 
+// PatchPayment modifies some fields of a payment prior to execution
+// Endpoint: PATCH /v1/payments/payment/ID
+func (c *Client) PatchPayment(paymentID string, p []PaymentPatch) (*Payment, error) {
+	req, err := c.NewRequest("PATCH", fmt.Sprintf("%s/v1/payments/payment/%s", c.APIBase, paymentID), p)
+	if err != nil {
+		return nil, err
+	}
+
+	response := Payment{}
+
+	if err = c.SendWithAuth(req, &response); err != nil {
+		return nil, err
+	}
+
+	return &response, nil
+}
+
 // GetPayments retrieve payments resources from Paypal
 // Endpoint: GET /v1/payments/payment/
 func (c *Client) GetPayments() ([]Payment, error) {
diff --git a/types.go b/types.go
index 314e09d..a33e096 100644
--- a/types.go
+++ b/types.go
@@ -257,6 +257,7 @@ type (
 		ID           string        `json:"id"`
 		Links        []Link        `json:"links"`
 		State        string        `json:"state"`
+		Payer        PaymentPayer  `json:"payer"`
 		Transactions []Transaction `json:"transactions,omitempty"`
 	}
 
@@ -331,6 +332,7 @@ type (
 		ShippingAddress *ShippingAddress `json:"shipping_address,omitempty"`
 		TaxIDType       string           `json:"tax_id_type,omitempty"`
 		TaxID           string           `json:"tax_id,omitempty"`
+		CountryCode     string           `json:"country_code"`
 	}
 
 	// Payment struct
@@ -358,6 +360,20 @@ type (
 		ChargeModels      []ChargeModel `json:"charge_models,omitempty"`
 	}
 
+	// PaymentPatch PATCH /v1/payments/payment/{payment_id)
+	PaymentPatch struct {
+		Operation string      `json:"op"`
+		Path      string      `json:"path"`
+		Value     interface{} `json:"value"`
+	}
+
+	// PaymentPayer struct
+	PaymentPayer struct {
+		PaymentMethod string     `json:"payment_method"`
+		Status        string     `json:"status,omitempty"`
+		PayerInfo     *PayerInfo `json:"payer_info,omitempty"`
+	}
+
 	// PaymentResponse structure
 	PaymentResponse struct {
 		ID    string `json:"id"`
diff --git a/unit_test.go b/unit_test.go
index 327a7e6..bbfd71c 100644
--- a/unit_test.go
+++ b/unit_test.go
@@ -286,6 +286,46 @@ func TestTypePayoutItemResponse(t *testing.T) {
 	}
 }
 
+func TestTypePaymentPatch(t *testing.T) {
+	// test unmarshaling
+	response := `{
+		"op": "replace",
+		"path": "/transactions/0/amount",
+		"value": "5"
+	}`
+	pp := &PaymentPatch{}
+	err := json.Unmarshal([]byte(response), pp)
+	if err != nil {
+		t.Errorf("TestTypePaymentPatch Unmarshal failed")
+	}
+	if pp.Operation != "replace" ||
+		pp.Path != "/transactions/0/amount" ||
+		pp.Value != "5" {
+		t.Errorf("PaymentPatch decoded result is incorrect, Given: %+v", pp)
+	}
+}
+
+func TestTypePaymentPatchMarshal(t *testing.T) {
+	// test marshalling
+	p2 := &PaymentPatch{
+		Operation: "add",
+		Path:      "/transactions/0/amount",
+		Value: map[string]interface{}{
+			"total":    "18.37",
+			"currency": "EUR",
+			"details": map[string]interface{}{
+				"subtotal": "13.37",
+				"shipping": "5.00",
+			},
+		},
+	}
+	p2expectedresponse := `{"op":"add","path":"/transactions/0/amount","value":{"currency":"EUR","details":{"shipping":"5.00","subtotal":"13.37"},"total":"18.37"}}`
+	response2, _ := json.Marshal(p2)
+	if string(response2) != string(p2expectedresponse) {
+		t.Errorf("PaymentPatch response2 is incorrect,\n Given:    %+v\n Expected: %+v", string(response2), string(p2expectedresponse))
+	}
+}
+
 // ServeHTTP implements http.Handler
 func (ts *webprofileTestServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	ts.t.Log(r.RequestURI)