diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -5,3 +5,5 @@
   <https://download.bitcoinabc.org/0.24.2/>
 
 This release includes the following features and fixes:
+ - The message signature prefix has been rebranded to `eCash Signed Message:`
+   (previously was `Bitcoin Signed Message:`).
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -2429,9 +2429,8 @@
     const std::string message = "Trust no one";
 
     const std::string expected_signature =
-        "IED/"
-        "JtZs3huKX9JEQIBPZPSZwOiMyDQ+"
-        "yNWQvL7YcFzCOGTcfleWOWSvfggenKCinqvOX8t1Iw+HYZqQjxzXQm0=";
+        "H3CcyS18y471Ya5WTYAke25spvA5eyBMvAuNhxDkuAjsdNGX+"
+        "NoouNlY1KoselGvF65Werf7OdtKAoOZ9WB17Rc=";
 
     CKey privkey;
     std::string generated_signature;
@@ -2487,15 +2486,15 @@
 
     BOOST_CHECK_EQUAL(
         MessageVerify(*params, "15CRxFdyRpGZLW9w8HnHvVduizdL5jKNbs",
-                      "IPojfrX2dfPnH26UegfbGQQLrdK844DlHq5157/P6h57WyuS/Qsl+h/"
-                      "WSVGDF4MUi4rWSswW38oimDYfNNUBUOk=",
+                      "H3CcyS18y471Ya5WTYAke25spvA5eyBMvAuNhxDkuAjsdNGX+"
+                      "NoouNlY1KoselGvF65Werf7OdtKAoOZ9WB17Rc=",
                       "Trust no one"),
         MessageVerificationResult::OK);
 
     BOOST_CHECK_EQUAL(
-        MessageVerify(*params, "11canuhp9X2NocwCq7xNrQYTmUgZAnLK3",
-                      "IIcaIENoYW5jZWxsb3Igb24gYnJpbmsgb2Ygc2Vjb25kIGJhaWxvdXQg"
-                      "Zm9yIGJhbmtzIAaHRtbCeDZINyavx14=",
+        MessageVerify(*params, "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs",
+                      "HxO6qEsMrNvPA7QTMUbdzF/uXbW78yPG6gFITses9XVvMdBULIFwrfhN"
+                      "f196N+rxnK5eSl8eF3aKe4INunzFJXg=",
                       "Trust me"),
         MessageVerificationResult::OK);
 }
diff --git a/src/util/message.cpp b/src/util/message.cpp
--- a/src/util/message.cpp
+++ b/src/util/message.cpp
@@ -19,7 +19,7 @@
  * Text used to signify that a signed message follows and to prevent
  * inadvertently signing a transaction.
  */
-const std::string MESSAGE_MAGIC = "Bitcoin Signed Message:\n";
+const std::string MESSAGE_MAGIC = "eCash Signed Message:\n";
 
 MessageVerificationResult MessageVerify(const CChainParams &params,
                                         const std::string &address,
diff --git a/test/functional/rpc_signmessage.py b/test/functional/rpc_signmessage.py
--- a/test/functional/rpc_signmessage.py
+++ b/test/functional/rpc_signmessage.py
@@ -22,7 +22,7 @@
         self.log.info('test signing with priv_key')
         priv_key = 'cUeKHd5orzT3mz8P9pxyREHfsWtVfgsfDjiZZBcjUBAaGk1BTj7N'
         address = 'mpLQjfK79b7CCV4VMJWEWAj5Mpx8Up5zxB'
-        expected_signature = 'IPDOIFcWd8LzOr70CXaal4+uG2ZZWcbHqutyGeO7AJ0MWbqq9C+u3KP9ScjtLzsIgY3st5n8XFQvgMZ0KrDQ9vg='
+        expected_signature = 'H/+xpIcWFrFLpyHC44kZSSuUqfv6T9CHzCIw/tsetxO0UYjIHvnvA891Hm7Ho3tTMRNYS2xf+lozdASttZc8L+8='
         signature = self.nodes[0].signmessagewithprivkey(priv_key, message)
         assert_equal(expected_signature, signature)
         assert self.nodes[0].verifymessage(address, signature, message)