diff --git a/README.md b/README.md
index 8f3d296..b213b1b 100644
--- a/README.md
+++ b/README.md
@@ -118,13 +118,13 @@ order, err := c.CreateOrder(paypalsdk.OrderIntentCapture, []paypalsdk.PurchaseUn
 ### Authorize Order
 
 ```go
-auth, err := c.AuthorizeOrder(orderID, &paypalsdk.Amount{Total: "7.00", Currency: "USD"})
+auth, err := c.AuthorizeOrder(orderID, paypalsdk.PaymentSource{})
 ```
 
 ### Capture Order
 
 ```go
-capture, err := c.CaptureOrder(orderID, &paypalsdk.Amount{Total: "7.00", Currency: "USD"}, true, nil)
+capture, err := c.CaptureOrder(orderID, paypalsdk.PaymentSource{})
 ```
 
 ### Void Order
diff --git a/integration_test.go b/integration_test.go
index e17a2d7..6c0fc10 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -122,7 +122,7 @@ func TestAuthorizeOrder(t *testing.T) {
 	c, _ := NewClient(testClientID, testSecret, APIBaseSandBox)
 	c.GetAccessToken()
 
-	_, err := c.AuthorizeOrder(testOrderID, &Amount{Total: "7.00", Currency: "USD"})
+	_, err := c.AuthorizeOrder(testOrderID, PaymentSource{})
 	if err == nil {
 		t.Errorf("Order is expired, 400 error must be returned")
 	}
@@ -132,7 +132,7 @@ func TestCaptureOrder(t *testing.T) {
 	c, _ := NewClient(testClientID, testSecret, APIBaseSandBox)
 	c.GetAccessToken()
 
-	_, err := c.CaptureOrder(testOrderID, &Amount{Total: "100", Currency: "USD"}, true, nil)
+	_, err := c.CaptureOrder(testOrderID, PaymentSource{})
 	if err == nil {
 		t.Errorf("Order is expired, 400 error must be returned")
 	}
diff --git a/order.go b/order.go
index 906aea0..d762c5d 100644
--- a/order.go
+++ b/order.go
@@ -42,14 +42,10 @@ func (c *Client) CreateOrder(intent string, purchaseUnits []PurchaseUnitRequest,
 
 // AuthorizeOrder - Use this call to authorize an order.
 // Endpoint: POST /v2/checkout/orders/ID/authorize
-func (c *Client) AuthorizeOrder(orderID string, amount *Amount) (*Authorization, error) {
-	type authRequest struct {
-		Amount *Amount `json:"amount"`
-	}
-
+func (c *Client) AuthorizeOrder(orderID string, paymentSource PaymentSource) (*Authorization, error) {
 	auth := &Authorization{}
 
-	req, err := c.NewRequest("POST", fmt.Sprintf("%s%s", c.APIBase, "/v2/checkout/orders/"+orderID+"/authorize"), authRequest{Amount: amount})
+	req, err := c.NewRequest("POST", fmt.Sprintf("%s%s", c.APIBase, "/v2/checkout/orders/"+orderID+"/authorize"), paymentSource)
 	if err != nil {
 		return auth, err
 	}
@@ -61,18 +57,12 @@ func (c *Client) AuthorizeOrder(orderID string, amount *Amount) (*Authorization,
 	return auth, nil
 }
 
-// CaptureOrder - Use this call to capture a payment on an order. To use this call, an original payment call must specify an intent of order.
+// CaptureOrder - Use this call to capture a payment on an order.
 // Endpoint: POST /v2/checkout/orders/ID/capture
-func (c *Client) CaptureOrder(orderID string, amount *Amount, isFinalCapture bool, currency *Currency) (*Capture, error) {
-	type captureRequest struct {
-		Amount         *Amount   `json:"amount"`
-		IsFinalCapture bool      `json:"is_final_capture"`
-		Currency       *Currency `json:"transaction_fee"`
-	}
-
+func (c *Client) CaptureOrder(orderID string, paymentSource PaymentSource) (*Capture, error) {
 	capture := &Capture{}
 
-	req, err := c.NewRequest("POST", fmt.Sprintf("%s%s", c.APIBase, "/v2/checkout/orders/"+orderID+"/capture"), captureRequest{Amount: amount, IsFinalCapture: isFinalCapture, Currency: currency})
+	req, err := c.NewRequest("POST", fmt.Sprintf("%s%s", c.APIBase, "/v2/checkout/orders/"+orderID+"/capture"), paymentSource)
 	if err != nil {
 		return capture, err
 	}
diff --git a/types.go b/types.go
index 0d13c7c..e113273 100644
--- a/types.go
+++ b/types.go
@@ -429,6 +429,40 @@ type (
 		Links        []Link        `json:"links"`
 	}
 
+	// PaymentSource structure
+	PaymentSource struct {
+		Card  *PaymentSourceCard  `json:"card"`
+		Token *PaymentSourceToken `json:"token"`
+	}
+
+	// PaymentSourceCard structure
+	PaymentSourceCard struct {
+		ID             string              `json:"id"`
+		Name           string              `json:"name"`
+		Number         string              `json:"number"`
+		Expiry         string              `json:"expiry"`
+		SecurityCode   string              `json:"security_code"`
+		LastDigits     string              `json:"last_digits"`
+		CardType       string              `json:"card_type"`
+		BillingAddress *CardBillingAddress `json:"billing_address"`
+	}
+
+	// CardBillingAddress structure
+	CardBillingAddress struct {
+		AddressLine1 string `json:"address_line_1"`
+		AddressLine2 string `json:"address_line_2"`
+		AdminArea2   string `json:"admin_area_2"`
+		AdminArea1   string `json:"admin_area_1"`
+		PostalCode   string `json:"postal_code"`
+		CountryCode  string `json:"country_code"`
+	}
+
+	// PaymentSourceToken structure
+	PaymentSourceToken struct {
+		ID   string `json:"id"`
+		Type string `json:"type"`
+	}
+
 	// Payout struct
 	Payout struct {
 		SenderBatchHeader *SenderBatchHeader `json:"sender_batch_header"`