diff --git a/README.md b/README.md
index e325cc7..49bb91f 100644
--- a/README.md
+++ b/README.md
@@ -148,6 +148,13 @@ assessment, err := client.RegisterPayment(&incognia.Payment{
     AccountID:      "account-id",
     ExternalID:     "external-id",
     PolicyID:       "policy-id",
+    Coupon:         &incognia.CouponType{
+        Type:        "coupon-type", //it should be percent_off or fixed_value
+        Value:       55.02,
+        MaxDiscount: 30,
+        Id:          "identifier",
+        Name:        "coupon-name",
+    },
     CustomProperties: myCustomPropertiesMap
     Addresses: []*incognia.TransactionAddress{
         {
diff --git a/incognia.go b/incognia.go
index 36b8064..91cef97 100644
--- a/incognia.go
+++ b/incognia.go
@@ -51,6 +51,7 @@ type Payment struct {
 	AccountID        string
 	ExternalID       string
 	PolicyID         string
+	Coupon           *CouponType
 	Addresses        []*TransactionAddress
 	Value            *PaymentValue
 	Methods          []*PaymentMethod
@@ -290,6 +291,7 @@ func (c *Client) registerPayment(payment *Payment) (ret *TransactionAssessment,
 		Type:             paymentType,
 		AccountID:        payment.AccountID,
 		PolicyID:         payment.PolicyID,
+		Coupon:           payment.Coupon,
 		ExternalID:       payment.ExternalID,
 		Addresses:        payment.Addresses,
 		PaymentValue:     payment.Value,
diff --git a/incognia_test.go b/incognia_test.go
index c2c8197..d19da74 100644
--- a/incognia_test.go
+++ b/incognia_test.go
@@ -178,11 +178,18 @@ var (
 		},
 	}
 	postPaymentRequestBodyFixture = &postTransactionRequestBody{
-		InstallationID:   &installationId,
-		AccountID:        "account-id",
-		ExternalID:       "external-id",
-		PolicyID:         "policy-id",
-		Type:             paymentType,
+		InstallationID: &installationId,
+		AccountID:      "account-id",
+		ExternalID:     "external-id",
+		PolicyID:       "policy-id",
+		Type:           paymentType,
+		Coupon: &CouponType{
+			Type:        "coupon_type",
+			Value:       55.02,
+			MaxDiscount: 30,
+			Id:          "identifier",
+			Name:        "CouponName",
+		},
 		CustomProperties: customProperty,
 		Addresses: []*TransactionAddress{
 			{
@@ -229,7 +236,14 @@ var (
 		AccountID:    "account-id",
 		ExternalID:   "external-id",
 		PolicyID:     "policy-id",
-		Type:         paymentType,
+		Coupon: &CouponType{
+			Type:        "coupon_type",
+			Value:       55.02,
+			MaxDiscount: 30,
+			Id:          "identifier",
+			Name:        "CouponName",
+		},
+		Type: paymentType,
 		Addresses: []*TransactionAddress{
 			{
 				Type: Billing,
@@ -276,10 +290,17 @@ var (
 		Type:           paymentType,
 	}
 	paymentFixture = &Payment{
-		InstallationID:   &installationId,
-		AccountID:        "account-id",
-		ExternalID:       "external-id",
-		PolicyID:         "policy-id",
+		InstallationID: &installationId,
+		AccountID:      "account-id",
+		ExternalID:     "external-id",
+		PolicyID:       "policy-id",
+		Coupon: &CouponType{
+			Type:        "coupon_type",
+			Value:       55.02,
+			MaxDiscount: 30,
+			Id:          "identifier",
+			Name:        "CouponName",
+		},
 		CustomProperties: customProperty,
 		Addresses: []*TransactionAddress{
 			{
@@ -326,6 +347,13 @@ var (
 		AccountID:    "account-id",
 		ExternalID:   "external-id",
 		PolicyID:     "policy-id",
+		Coupon: &CouponType{
+			Type:        "coupon_type",
+			Value:       55.02,
+			MaxDiscount: 30,
+			Id:          "identifier",
+			Name:        "CouponName",
+		},
 		Addresses: []*TransactionAddress{
 			{
 				Type: Billing,
diff --git a/request_types.go b/request_types.go
index 84eb31a..3d1f592 100644
--- a/request_types.go
+++ b/request_types.go
@@ -106,6 +106,14 @@ type PaymentValue struct {
 	Currency string  `json:"currency"`
 }
 
+type CouponType struct {
+	Type        string  `json:"type"`
+	Value       float64 `json:"value"`
+	MaxDiscount float64 `json:"max_discount"`
+	Id          string  `json:"id"`
+	Name        string  `json:"name"`
+}
+
 type paymentMethodType string
 
 const (
@@ -136,6 +144,7 @@ type PaymentMethod struct {
 type postTransactionRequestBody struct {
 	ExternalID              string                 `json:"external_id,omitempty"`
 	PolicyID                string                 `json:"policy_id,omitempty"`
+	Coupon                  *CouponType            `json:"coupon,omitempty"`
 	InstallationID          *string                `json:"installation_id,omitempty"`
 	PaymentMethodIdentifier string                 `json:"payment_method_identifier,omitempty"`
 	Type                    transactionType        `json:"type"`