diff --git a/lnwallet/chancloser/rbf_coop_transitions.go b/lnwallet/chancloser/rbf_coop_transitions.go
index 2667b7e4a..01ab5c32f 100644
--- a/lnwallet/chancloser/rbf_coop_transitions.go
+++ b/lnwallet/chancloser/rbf_coop_transitions.go
@@ -722,12 +722,13 @@ func (l *LocalCloseStart) ProcessEvent(event ProtocolEvent, env *Environment,
 		// TODO(roasbeef): type alias for protocol event
 		sendEvent := protofsm.DaemonEventSet{&protofsm.SendMsgEvent[ProtocolEvent]{ //nolint:ll
 			TargetPeer: env.ChanPeer,
-			// TODO(roasbeef): mew new func
 			Msgs: []lnwire.Message{&lnwire.ClosingComplete{
-				ChannelID:   env.ChanID,
-				FeeSatoshis: absoluteFee,
-				LockTime:    env.BlockHeight,
-				ClosingSigs: closingSigs,
+				ChannelID:    env.ChanID,
+				CloserScript: l.LocalDeliveryScript,
+				CloseeScript: l.RemoteDeliveryScript,
+				FeeSatoshis:  absoluteFee,
+				LockTime:     env.BlockHeight,
+				ClosingSigs:  closingSigs,
 			}},
 		}}
 
@@ -991,8 +992,12 @@ func (l *RemoteCloseStart) ProcessEvent(event ProtocolEvent, env *Environment,
 		sendEvent := &protofsm.SendMsgEvent[ProtocolEvent]{
 			TargetPeer: env.ChanPeer,
 			Msgs: []lnwire.Message{&lnwire.ClosingSig{
-				ChannelID:   env.ChanID,
-				ClosingSigs: closingSigs,
+				ChannelID:    env.ChanID,
+				CloserScript: l.RemoteDeliveryScript,
+				CloseeScript: l.LocalDeliveryScript,
+				FeeSatoshis:  msg.SigMsg.FeeSatoshis,
+				LockTime:     msg.SigMsg.LockTime,
+				ClosingSigs:  closingSigs,
 			}},
 		}
 		broadcastEvent := &protofsm.BroadcastTxn{
diff --git a/lnwire/closing_complete.go b/lnwire/closing_complete.go
index c16760a4e..4d390fd6f 100644
--- a/lnwire/closing_complete.go
+++ b/lnwire/closing_complete.go
@@ -30,6 +30,14 @@ type ClosingComplete struct {
 	// ChannelID serves to identify which channel is to be closed.
 	ChannelID ChannelID
 
+	// CloserScript is the script to which the channel funds will be paid
+	// for the closer (the person sending the ClosingComplete) message.
+	CloserScript DeliveryAddress
+
+	// CloseeScript is the script to which the channel funds will be paid
+	// (the person receiving the ClosingComplete message).
+	CloseeScript DeliveryAddress
+
 	// FeeSatoshis is the total fee in satoshis that the party to the
 	// channel would like to propose for the close transaction.
 	FeeSatoshis btcutil.Amount
@@ -79,7 +87,10 @@ func decodeClosingSigs(c *ClosingSigs, tlvRecords ExtraOpaqueData) error {
 // passed io.Reader.
 func (c *ClosingComplete) Decode(r io.Reader, _ uint32) error {
 	// First, read out all the fields that are hard coded into the message.
-	err := ReadElements(r, &c.ChannelID, &c.FeeSatoshis, &c.LockTime)
+	err := ReadElements(
+		r, &c.ChannelID, &c.CloserScript, &c.CloseeScript,
+		&c.FeeSatoshis, &c.LockTime,
+	)
 	if err != nil {
 		return err
 	}
@@ -125,6 +136,13 @@ func (c *ClosingComplete) Encode(w *bytes.Buffer, _ uint32) error {
 		return err
 	}
 
+	if err := WriteDeliveryAddress(w, c.CloserScript); err != nil {
+		return err
+	}
+	if err := WriteDeliveryAddress(w, c.CloseeScript); err != nil {
+		return err
+	}
+
 	if err := WriteSatoshi(w, c.FeeSatoshis); err != nil {
 		return err
 	}
diff --git a/lnwire/closing_sig.go b/lnwire/closing_sig.go
index df160d12e..2c73fa720 100644
--- a/lnwire/closing_sig.go
+++ b/lnwire/closing_sig.go
@@ -3,6 +3,8 @@ package lnwire
 import (
 	"bytes"
 	"io"
+
+	"github.com/btcsuite/btcd/btcutil"
 )
 
 // ClosingSig is sent in response to a ClosingComplete message. It carries the
@@ -11,6 +13,22 @@ type ClosingSig struct {
 	// ChannelID serves to identify which channel is to be closed.
 	ChannelID ChannelID
 
+	// CloserScript is the script to which the channel funds will be paid
+	// for the closer (the person sending the ClosingComplete) message.
+	CloserScript DeliveryAddress
+
+	// CloseeScript is the script to which the channel funds will be paid
+	// (the person receiving the ClosingComplete message).
+	CloseeScript DeliveryAddress
+
+	// FeeSatoshis is the total fee in satoshis that the party to the
+	// channel proposed for the close transaction.
+	FeeSatoshis btcutil.Amount
+
+	// LockTime is the locktime number to be used in the input spending the
+	// funding transaction.
+	LockTime uint32
+
 	// ClosingSigs houses the 3 possible signatures that can be sent.
 	ClosingSigs
 
@@ -24,7 +42,10 @@ type ClosingSig struct {
 // io.Reader.
 func (c *ClosingSig) Decode(r io.Reader, _ uint32) error {
 	// First, read out all the fields that are hard coded into the message.
-	err := ReadElements(r, &c.ChannelID)
+	err := ReadElements(
+		r, &c.ChannelID, &c.CloserScript, &c.CloseeScript,
+		&c.FeeSatoshis, &c.LockTime,
+	)
 	if err != nil {
 		return err
 	}
@@ -53,6 +74,21 @@ func (c *ClosingSig) Encode(w *bytes.Buffer, _ uint32) error {
 		return err
 	}
 
+	if err := WriteDeliveryAddress(w, c.CloserScript); err != nil {
+		return err
+	}
+	if err := WriteDeliveryAddress(w, c.CloseeScript); err != nil {
+		return err
+	}
+
+	if err := WriteSatoshi(w, c.FeeSatoshis); err != nil {
+		return err
+	}
+
+	if err := WriteUint32(w, c.LockTime); err != nil {
+		return err
+	}
+
 	recordProducers := closingSigRecords(&c.ClosingSigs)
 
 	err := EncodeMessageExtraData(&c.ExtraData, recordProducers...)
diff --git a/lnwire/lnwire_test.go b/lnwire/lnwire_test.go
index db3ffd39d..123689902 100644
--- a/lnwire/lnwire_test.go
+++ b/lnwire/lnwire_test.go
@@ -1355,6 +1355,18 @@ func TestLightningWireProtocol(t *testing.T) {
 				LockTime:    uint32(r.Int63()),
 				ClosingSigs: ClosingSigs{},
 			}
+			req.CloserScript, err = randDeliveryAddress(r)
+			if err != nil {
+				t.Fatalf("unable to generate delivery "+
+					"address: %v", err)
+				return
+			}
+			req.CloseeScript, err = randDeliveryAddress(r)
+			if err != nil {
+				t.Fatalf("unable to generate delivery "+
+					"address: %v", err)
+				return
+			}
 
 			if r.Intn(2) == 0 {
 				sig := req.CloserNoClosee.Zero()
@@ -1403,6 +1415,20 @@ func TestLightningWireProtocol(t *testing.T) {
 			req := ClosingSig{
 				ChannelID:   ChannelID(c),
 				ClosingSigs: ClosingSigs{},
+				FeeSatoshis: btcutil.Amount(r.Int63()),
+				LockTime:    uint32(r.Int63()),
+			}
+			req.CloserScript, err = randDeliveryAddress(r)
+			if err != nil {
+				t.Fatalf("unable to generate delivery "+
+					"address: %v", err)
+				return
+			}
+			req.CloseeScript, err = randDeliveryAddress(r)
+			if err != nil {
+				t.Fatalf("unable to generate delivery "+
+					"address: %v", err)
+				return
 			}
 
 			if r.Intn(2) == 0 {