diff --git a/assets/penalty_details.yml b/assets/penalty_details.yml
index 2e37f91..b20b5af 100644
--- a/assets/penalty_details.yml
+++ b/assets/penalty_details.yml
@@ -4,6 +4,7 @@ details:
   LP:
     Description: "Late Filing Penalty"
     DescriptionId: "late-filing-penalty"
+    ClassOfPayment: "penalty"
     ResourceKind: "late-filing-penalty#late-filing-penalty"
     ProductType: "late-filing-penalty"
     EmailReceivedAppId: "penalty-payment-api.penalty_payment_received_email"
@@ -11,6 +12,7 @@ details:
   C1:
     Description: "Sanctions Penalty Payment"
     DescriptionId: "penalty-sanctions"
+    ClassOfPayment: "data-maintenance"
     ResourceKind: "penalty#sanctions"
     ProductType: "penalty-sanctions"
     EmailReceivedAppId: "penalty-payment-api.penalty_payment_received_email"
diff --git a/config/config.go b/config/config.go
index 3fbf3cb..c958142 100644
--- a/config/config.go
+++ b/config/config.go
@@ -42,6 +42,7 @@ type PenaltyDetailsMap struct {
 type PenaltyDetails struct {
 	Description        string `yaml:"Description"`
 	DescriptionId      string `yaml:"DescriptionId"`
+	ClassOfPayment     string `yaml:"ClassOfPayment"`
 	ResourceKind       string `yaml:"ResourceKind"`
 	ProductType        string `yaml:"ProductType"`
 	EmailReceivedAppId string `yaml:"EmailReceivedAppId"`
diff --git a/spec/schema.json b/spec/schema.json
index 15afbfd..717a950 100644
--- a/spec/schema.json
+++ b/spec/schema.json
@@ -608,7 +608,8 @@
           "items": {
             "type": "string",
             "enum": [
-              "penalty"
+              "penalty",
+              "data-maintenance"
             ]
           }
         },
diff --git a/transformers/payable_resource.go b/transformers/payable_resource.go
index bc38153..bd89d98 100644
--- a/transformers/payable_resource.go
+++ b/transformers/payable_resource.go
@@ -112,7 +112,7 @@ func PayableResourceToPaymentDetails(payable *models.PayableResource,
 		cost := models.Cost{
 			Amount:                  fmt.Sprintf("%g", tx.Amount),
 			AvailablePaymentMethods: []string{"credit-card"},
-			ClassOfPayment:          []string{"penalty"},
+			ClassOfPayment:          []string{penaltyDetailsMap.Details[companyCode].ClassOfPayment},
 			Description:             penaltyDetailsMap.Details[companyCode].Description,
 			DescriptionIdentifier:   penaltyDetailsMap.Details[companyCode].DescriptionId,
 			Kind:                    "cost#cost",
diff --git a/transformers/payable_resource_test.go b/transformers/payable_resource_test.go
index bccb3c0..9f66af5 100644
--- a/transformers/payable_resource_test.go
+++ b/transformers/payable_resource_test.go
@@ -195,3 +195,73 @@ func TestUnitPayableResourceToPaymentDetails(t *testing.T) {
 		So(response.Items[0].ProductType, ShouldEqual, "late-filing-penalty")
 	})
 }
+
+func TestUnitPayableResourceToPaymentDetailsConfirmationStatement(t *testing.T) {
+	Convey("field mappings are correct from payable resource to payment details", t, func() {
+		t := time.Now().Truncate(time.Millisecond)
+		payable := &models.PayableResource{
+			CompanyNumber: "12345678",
+			Reference:     "1234",
+			Etag:          "qwertyetag1234",
+			CreatedAt:     &t,
+			CreatedBy: models.CreatedBy{
+				ID:       "uz3r_1d",
+				Email:    "test@user.com",
+				Forename: "some",
+				Surname:  "body",
+			},
+			Links: models.PayableResourceLinks{
+				Self:    "/foo",
+				Payment: "/foo/pay",
+			},
+			Payment: models.Payment{
+				Amount:    "100",
+				Status:    "pending",
+				Reference: "payref",
+				PaidAt:    &t,
+			},
+			Transactions: []models.TransactionItem{
+				{
+					Amount:     100,
+					Type:       "penalty",
+					MadeUpDate: "2019-01-01",
+				},
+			},
+		}
+
+		penaltyDetailsMap, err := config.LoadPenaltyDetails("../assets/penalty_details.yml")
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		response := PayableResourceToPaymentDetails(payable, penaltyDetailsMap, utils.Sanctions)
+
+		_, filename, _, _ := runtime.Caller(0)
+		fmt.Printf("Current test filename: %s\n", filename)
+
+		dir, err := os.Getwd()
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println("Dir: " + dir)
+
+		So(response, ShouldNotBeNil)
+		So(response.Description, ShouldEqual, "Sanctions Penalty Payment")
+		So(response.Kind, ShouldEqual, "payment-details#payment-details")
+		So(response.PaidAt, ShouldEqual, payable.Payment.PaidAt)
+		So(response.PaymentReference, ShouldEqual, payable.Payment.Reference)
+		So(response.Links.Self, ShouldEqual, payable.Links.Payment)
+		So(response.Links.Resource, ShouldEqual, payable.Links.Self)
+		So(response.Status, ShouldEqual, payable.Payment.Status)
+		So(response.CompanyNumber, ShouldEqual, payable.CompanyNumber)
+		So(len(response.Items), ShouldEqual, 1)
+		So(response.Items[0].Amount, ShouldEqual, fmt.Sprintf("%g", payable.Transactions[0].Amount))
+		So(response.Items[0].AvailablePaymentMethods, ShouldResemble, []string{"credit-card"})
+		So(response.Items[0].ClassOfPayment, ShouldResemble, []string{"data-maintenance"})
+		So(response.Items[0].Description, ShouldEqual, "Sanctions Penalty Payment")
+		So(response.Items[0].DescriptionIdentifier, ShouldEqual, "penalty-sanctions")
+		So(response.Items[0].Kind, ShouldEqual, "cost#cost")
+		So(response.Items[0].ResourceKind, ShouldEqual, "penalty#sanctions")
+		So(response.Items[0].ProductType, ShouldEqual, "penalty-sanctions")
+	})
+}