diff --git a/changelogs/server_server/newsfragments/2570.clarification b/changelogs/server_server/newsfragments/2570.clarification
new file mode 100644
index 00000000..3fac40bf
--- /dev/null
+++ b/changelogs/server_server/newsfragments/2570.clarification
@@ -0,0 +1 @@
+Clarify the server names to use when signing requests.
diff --git a/specification/server_server_api.rst b/specification/server_server_api.rst
index b0a2bc1a..ca147665 100644
--- a/specification/server_server_api.rst
+++ b/specification/server_server_api.rst
@@ -291,6 +291,11 @@ Step 1 sign JSON:
         }
    }
 
+The server names in the JSON above are the server names involved. Delegation from
+the `server name resolution section <#resolving-server-names>`_ above do not affect
+these - the server names from before delegation would take place are used. This
+same condition applies throughout the request signing process.
+
 Step 2 add Authorization header:
 
 .. code::