diff --git a/modules/apps/27-interchain-accounts/types/codec.go b/modules/apps/27-interchain-accounts/types/codec.go
index f81a14eb70e..2f2e92f2208 100644
--- a/modules/apps/27-interchain-accounts/types/codec.go
+++ b/modules/apps/27-interchain-accounts/types/codec.go
@@ -22,11 +22,6 @@ var ModuleCdc = codec.NewProtoCodec(codectypes.NewInterfaceRegistry())
 func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 	registry.RegisterImplementations((*authtypes.AccountI)(nil), &InterchainAccount{})
 	registry.RegisterImplementations((*authtypes.GenesisAccount)(nil), &InterchainAccount{})
-
-	registry.RegisterImplementations(
-		(*exported.CallbackPacketData)(nil),
-		&InterchainAccountPacketData{},
-	)
 }
 
 // SerializeCosmosTx serializes a slice of sdk.Msg's using the CosmosTx type. The sdk.Msg's are
diff --git a/modules/apps/27-interchain-accounts/types/codec_test.go b/modules/apps/27-interchain-accounts/types/codec_test.go
index 6ba9e941341..8f77d4fb93d 100644
--- a/modules/apps/27-interchain-accounts/types/codec_test.go
+++ b/modules/apps/27-interchain-accounts/types/codec_test.go
@@ -14,28 +14,6 @@ import (
 	"github.com/cosmos/ibc-go/v7/testing/simapp"
 )
 
-func (suite *TypesTestSuite) TestUnmarshalCallbackPacketData() {
-	sourceCallbackAddress := "sourceCallbackAddress"
-
-	packetData := types.InterchainAccountPacketData{
-		Type: types.EXECUTE_TX,
-		Data: []byte("data"),
-		Memo: fmt.Sprintf("{\"callbacks\": {\"src_callback_address\": \"%s\"}}", sourceCallbackAddress),
-	}
-
-	types.RegisterInterfaces(types.ModuleCdc.InterfaceRegistry())
-	data, err := types.ModuleCdc.MarshalInterfaceJSON(&packetData)
-	suite.Require().NoError(err)
-
-	var callbackPacketData exported.CallbackPacketData
-	err = suite.chainA.App.AppCodec().UnmarshalInterfaceJSON(data, &callbackPacketData)
-	suite.Require().NoError(err, "failed to unmarshal into callback packet data interface")
-
-	suite.Require().Equal(sourceCallbackAddress, callbackPacketData.GetSourceCallbackAddress())
-	suite.Require().Equal("", callbackPacketData.GetDestCallbackAddress())
-	suite.Require().Equal(uint64(0), callbackPacketData.UserDefinedGasLimit())
-}
-
 // mockSdkMsg defines a mock struct, used for testing codec error scenarios
 type mockSdkMsg struct{}
 
diff --git a/modules/apps/transfer/types/codec.go b/modules/apps/transfer/types/codec.go
index 53021b817a8..288ecb2fc8c 100644
--- a/modules/apps/transfer/types/codec.go
+++ b/modules/apps/transfer/types/codec.go
@@ -30,11 +30,6 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		&TransferAuthorization{},
 	)
 
-	registry.RegisterImplementations(
-		(*exported.CallbackPacketData)(nil),
-		&FungibleTokenPacketData{},
-	)
-
 	msgservice.RegisterMsgServiceDesc(registry, &_Msg_serviceDesc)
 }
 
diff --git a/modules/core/exported/codec.go b/modules/core/exported/codec.go
deleted file mode 100644
index 832442ba33f..00000000000
--- a/modules/core/exported/codec.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package exported
-
-import (
-	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
-)
-
-// RegisterInterfaces registers the CallbackPacketDataI interface.
-func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
-	registry.RegisterInterface(
-		"ibc.core.exported.v1.CallbackPacketData",
-		(*CallbackPacketData)(nil),
-	)
-}