diff --git a/API-CHANGELOG.md b/API-CHANGELOG.md
index 0d5d8a8196..dd3fcd018b 100644
--- a/API-CHANGELOG.md
+++ b/API-CHANGELOG.md
@@ -83,9 +83,17 @@ The [commandline](https://xrpl.org/docs/references/http-websocket-apis/api-conve
 
 The `network_id` field was added in the `server_info` response in version 1.5.0 (2019), but it is not returned in [reporting mode](https://xrpl.org/rippled-server-modes.html#reporting-mode). However, use of reporting mode is now discouraged, in favor of using [Clio](https://github.com/XRPLF/clio) instead.
 
+## XRP Ledger server version 2.5.0
+
+As of 2025-04-04, version 2.5.0 is in development. You can use a pre-release version by building from source or [using the `nightly` package](https://xrpl.org/docs/infrastructure/installation/install-rippled-on-ubuntu).
+
+### Additions and bugfixes in 2.5.0
+
+- `channel_authorize`: If `signing_support` is not enabled in the config, the RPC is disabled.
+
 ## XRP Ledger server version 2.4.0
 
-As of 2025-01-28, version 2.4.0 is in development. You can use a pre-release version by building from source or [using the `nightly` package](https://xrpl.org/docs/infrastructure/installation/install-rippled-on-ubuntu).
+[Version 2.4.0](https://github.com/XRPLF/rippled/releases/tag/2.4.0) was released on March 4, 2025.
 
 ### Additions and bugfixes in 2.4.0
 
diff --git a/src/xrpld/rpc/handlers/PayChanClaim.cpp b/src/xrpld/rpc/handlers/PayChanClaim.cpp
index aaa559895c..b62f5e54e5 100644
--- a/src/xrpld/rpc/handlers/PayChanClaim.cpp
+++ b/src/xrpld/rpc/handlers/PayChanClaim.cpp
@@ -17,6 +17,7 @@
 */
 //==============================================================================
 
+#include <xrpld/app/main/Application.h>
 #include <xrpld/ledger/ReadView.h>
 #include <xrpld/rpc/Context.h>
 #include <xrpld/rpc/detail/RPCHelpers.h>
@@ -40,6 +41,12 @@ namespace ripple {
 Json::Value
 doChannelAuthorize(RPC::JsonContext& context)
 {
+    if (context.role != Role::ADMIN && !context.app.config().canSign())
+    {
+        return RPC::make_error(
+            rpcNOT_SUPPORTED, "Signing is not supported by this server.");
+    }
+
     auto const& params(context.params);
     for (auto const& p : {jss::channel_id, jss::amount})
         if (!params.isMember(p))