diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -3,4 +3,4 @@
   <https://download.bitcoinabc.org/0.19.5/>
 
 This release includes the following features and fixes:
-
+ - Deprecated the `-reserveChangeKey` option for `fundrawtransaction` wallet rpc command.
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3465,8 +3465,8 @@
             "false) Also select inputs which are watch only\n"
             "     \"lockUnspents\"           (boolean, optional, default "
             "false) Lock selected unspent outputs\n"
-            "     \"reserveChangeKey\"       (boolean, optional, default true) "
-            "Reserves the change output key from the keypool\n"
+            "     \"reserveChangeKey\"       (boolean, optional) "
+            "DEPRECATED.  Reserves the change output key from the keypool\n"
             "     \"feeRate\"                (numeric, optional, default not "
             "set: makes wallet determine the fee) Set a specific feerate (" +
             CURRENCY_UNIT +
@@ -3517,7 +3517,8 @@
     CCoinControl coinControl;
     int changePosition = -1;
     bool lockUnspents = false;
-    bool reserveChangeKey = true;
+    // DEPRECATED, should be removed in 0.20
+    bool reserveChangeKey = false;
     UniValue subtractFeeFromOutputs;
     std::set<int> setSubtractFeeFromOutputs;
 
@@ -3537,6 +3538,7 @@
                     {"changePosition", UniValueType(UniValue::VNUM)},
                     {"includeWatching", UniValueType(UniValue::VBOOL)},
                     {"lockUnspents", UniValueType(UniValue::VBOOL)},
+                    // DEPRECATED, should be removed in 0.20
                     {"reserveChangeKey", UniValueType(UniValue::VBOOL)},
                     // will be checked below
                     {"feeRate", UniValueType()},
@@ -3571,8 +3573,20 @@
                 lockUnspents = options["lockUnspents"].get_bool();
             }
 
+            // DEPRECATED, should be removed in v0.20
             if (options.exists("reserveChangeKey")) {
-                reserveChangeKey = options["reserveChangeKey"].get_bool();
+                if (!IsDeprecatedRPCEnabled(gArgs, "fundrawtransaction")) {
+                    throw JSONRPCError(
+                        RPC_METHOD_DEPRECATED,
+                        "fundrawtransaction -reserveChangeKey is deprecated "
+                        "and will be fully removed in v0.20.  To use the "
+                        "-reserveChangeKey option in v0.19, restart bitcoind "
+                        "with -deprecatedrpc=fundrawtransaction.\nProjects "
+                        "should transition to expecting change addresses "
+                        "removed from the keypool before upgrading to v0.20");
+                } else {
+                    reserveChangeKey = options["reserveChangeKey"].get_bool();
+                }
             }
 
             if (options.exists("feeRate")) {
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -988,7 +988,7 @@
                          int &nChangePosInOut, std::string &strFailReason,
                          bool lockUnspents,
                          const std::set<int> &setSubtractFeeFromOutputs,
-                         CCoinControl coinControl, bool keepReserveKey = true);
+                         CCoinControl coinControl, bool keepReserveKey);
     bool SignTransaction(CMutableTransaction &tx);
 
     /**
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -19,6 +19,7 @@
 #include <policy/policy.h>
 #include <primitives/block.h>
 #include <primitives/transaction.h>
+#include <rpc/server.h> // for IsDeprecatedRPCEnabled
 #include <scheduler.h>
 #include <script/script.h>
 #include <script/sighashtype.h>
@@ -2788,6 +2789,12 @@
     if (nChangePosInOut != -1) {
         tx.vout.insert(tx.vout.begin() + nChangePosInOut,
                        tx_new->vout[nChangePosInOut]);
+        // we dont have the normal Create/Commit cycle, and dont want to
+        // risk reusing change, so just remove the key from the keypool
+        // here.
+        if (!IsDeprecatedRPCEnabled(gArgs, "fundrawtransaction")) {
+            reservekey.KeepKey();
+        }
     }
 
     // Copy output sizes from new transaction; they may have had the fee
@@ -2808,9 +2815,13 @@
         }
     }
 
+    // DEPRECATED, remove in 0.20 with -reserveChangeKey
     // Optionally keep the change output key.
-    if (keepReserveKey) {
-        reservekey.KeepKey();
+    if (IsDeprecatedRPCEnabled(gArgs, "fundrawtransaction")) {
+
+        if (keepReserveKey) {
+            reservekey.KeepKey();
+        }
     }
 
     return true;
diff --git a/test/functional/rpc_fundrawtransaction.py b/test/functional/rpc_fundrawtransaction.py
--- a/test/functional/rpc_fundrawtransaction.py
+++ b/test/functional/rpc_fundrawtransaction.py
@@ -27,8 +27,10 @@
 
 class RawTransactionsTest(BitcoinTestFramework):
     def set_test_params(self):
-        self.num_nodes = 4
+        self.num_nodes = 5
         self.setup_clean_chain = True
+        self.extra_args = [[], [], [], [],
+                           ["-deprecatedrpc=fundrawtransaction"]]
 
     def setup_network(self, split=False):
         self.setup_nodes()
@@ -37,6 +39,7 @@
         connect_nodes_bi(self.nodes[1], self.nodes[2])
         connect_nodes_bi(self.nodes[0], self.nodes[2])
         connect_nodes_bi(self.nodes[0], self.nodes[3])
+        connect_nodes_bi(self.nodes[0], self.nodes[4])
 
     def run_test(self):
         min_relay_tx_fee = self.nodes[0].getnetworkinfo()['relayfee']
@@ -74,6 +77,7 @@
             watchonly_address, watchonly_amount)
         self.nodes[0].sendtoaddress(
             self.nodes[3].getnewaddress(), watchonly_amount / 10)
+        self.nodes[0].sendtoaddress(self.nodes[4].getnewaddress(), 5.0)
 
         self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 1.5)
         self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 1.0)
@@ -476,6 +480,7 @@
         self.nodes[1].node_encrypt_wallet("test")
         self.stop_node(2)
         self.stop_node(3)
+        self.stop_node(4)
 
         self.start_nodes()
         # This test is not meant to test fee estimation and we'd like
@@ -487,6 +492,7 @@
         connect_nodes_bi(self.nodes[1], self.nodes[2])
         connect_nodes_bi(self.nodes[0], self.nodes[2])
         connect_nodes_bi(self.nodes[0], self.nodes[3])
+        connect_nodes_bi(self.nodes[0], self.nodes[4])
         self.sync_all()
 
         # drain the keypool
@@ -681,21 +687,46 @@
             result3['fee'], FromHex(CTransaction(), result3['hex']).billable_size(), 10 * result_fee_rate, 10)
 
         #
+        # DEPRECATED, should be removed in v0.20
         # Test address reuse option #
         #
 
-        result3 = self.nodes[3].fundrawtransaction(
-            rawTx, {"reserveChangeKey": False})
-        res_dec = self.nodes[0].decoderawtransaction(result3["hex"])
+        dInputs = []
+        dOutputs = {self.nodes[4].getnewaddress(): 1}
+        dRawTx = self.nodes[4].createrawtransaction(dInputs, dOutputs)
+        dResult = self.nodes[4].fundrawtransaction(
+            dRawTx, {"reserveChangeKey": False})
+        res_dec = self.nodes[0].decoderawtransaction(dResult["hex"])
         changeaddress = ""
         for out in res_dec['vout']:
             if out['value'] > 1.0:
                 changeaddress += out['scriptPubKey']['addresses'][0]
         assert(changeaddress != "")
-        nextaddr = self.nodes[3].getrawchangeaddress()
+        nextaddr = self.nodes[4].getrawchangeaddress()
         # frt should not have removed the key from the keypool
         assert(changeaddress == nextaddr)
 
+        #
+        # DEPRECATED, should be removed in v0.20
+        # Test address reuse option does #
+        # throws an rpc error when not deprecated #
+        #
+
+        assert_raises_rpc_error(-32, "fundrawtransaction -reserveChangeKey "
+                                + "is deprecated and will be fully removed "
+                                + "in v0.20.  To use the -reserveChangeKey "
+                                + "option in v0.19, restart bitcoind with "
+                                + "-deprecatedrpc=fundrawtransaction.\n"
+                                + "Projects should transition to expecting "
+                                + "change addresses removed from the keypool "
+                                + "before upgrading to v0.20",
+                                self.nodes[3].fundrawtransaction, rawTx,
+                                {"reserveChangeKey": False})
+
+        #
+        # Test no address reuse occurs #
+        #
+
         result3 = self.nodes[3].fundrawtransaction(rawTx)
         res_dec = self.nodes[0].decoderawtransaction(result3["hex"])
         changeaddress = ""