diff --git a/balancetransaction.go b/balancetransaction.go
index a77666a740..f15a1a5b1c 100644
--- a/balancetransaction.go
+++ b/balancetransaction.go
@@ -186,8 +186,3 @@ func (s *BalanceTransactionSource) UnmarshalJSON(data []byte) error {
 
 	return err
 }
-
-// MarshalJSON handles serialization of a BalanceTransactionSource.
-func (s *BalanceTransactionSource) MarshalJSON() ([]byte, error) {
-	return json.Marshal(s.ID)
-}
diff --git a/payout.go b/payout.go
index fcc8af26d6..4126ae513f 100644
--- a/payout.go
+++ b/payout.go
@@ -182,11 +182,3 @@ func (d *PayoutDestination) UnmarshalJSON(data []byte) error {
 
 	return err
 }
-
-// MarshalJSON handles serialization of a PayoutDestination.
-// This custom marshaling is needed because we can only send a string
-// ID as a destination, even though it can be expanded to a full
-// object when retrieving
-func (d *PayoutDestination) MarshalJSON() ([]byte, error) {
-	return json.Marshal(d.ID)
-}
diff --git a/recipienttransfer.go b/recipienttransfer.go
index b6f6482fd7..854beec81c 100644
--- a/recipienttransfer.go
+++ b/recipienttransfer.go
@@ -153,11 +153,3 @@ func (d *RecipientTransferDestination) UnmarshalJSON(data []byte) error {
 
 	return err
 }
-
-// MarshalJSON handles serialization of a RecipientTransferDestination.
-// This custom marshaling is needed because we can only send a string
-// ID as a destination, even though it can be expanded to a full
-// object when retrieving
-func (d *RecipientTransferDestination) MarshalJSON() ([]byte, error) {
-	return json.Marshal(d.ID)
-}
diff --git a/transfer.go b/transfer.go
index ef61de580b..3616a56c03 100644
--- a/transfer.go
+++ b/transfer.go
@@ -108,11 +108,3 @@ func (d *TransferDestination) UnmarshalJSON(data []byte) error {
 	*d = TransferDestination(v)
 	return json.Unmarshal(data, &d.Account)
 }
-
-// MarshalJSON handles serialization of a TransferDestination.
-// This custom marshaling is needed because we can only send a string
-// ID as a destination, even though it can be expanded to a full
-// object when retrieving
-func (d *TransferDestination) MarshalJSON() ([]byte, error) {
-	return json.Marshal(d.ID)
-}
diff --git a/transfer_test.go b/transfer_test.go
index de1d06a465..5dc6dea38a 100644
--- a/transfer_test.go
+++ b/transfer_test.go
@@ -39,14 +39,11 @@ func TestTransferDestination_UnmarshalJSON(t *testing.T) {
 
 	// Unmarshals from a JSON object
 	{
-		// We build the JSON object manually here because TransferDestination
-		// has a custom MarshalJSON implementation as well, and it'll turn into
-		// a string if we marshaled a struct instance. This ensures that we're
-		// working with a JSON objects.
-		data := []byte(`{"id":"acct_123"}`)
+		v := TransferDestination{ID: "acct_123"}
+		data, err := json.Marshal(&v)
+		assert.NoError(t, err)
 
-		var v TransferDestination
-		err := json.Unmarshal(data, &v)
+		err = json.Unmarshal(data, &v)
 		assert.NoError(t, err)
 		assert.Equal(t, "acct_123", v.ID)