diff --git a/keyserver/src/creators/account-creator.js b/keyserver/src/creators/account-creator.js
--- a/keyserver/src/creators/account-creator.js
+++ b/keyserver/src/creators/account-creator.js
@@ -189,23 +189,7 @@
     ...messageInfos,
   ];
 
-  const issuedAt = new Date().toISOString();
-  const payload: $ReadOnlyArray<string> = [request.username];
-  const reservedUsernameMessage: ReservedUsernameMessage = {
-    statement: 'Add the following usernames to reserved list',
-    payload,
-    issuedAt,
-  };
-  const stringifiedMessage = JSON.stringify(reservedUsernameMessage);
-
-  handleAsyncPromise(
-    (async () => {
-      const rustAPI = await getRustAPI();
-      const accountInfo = await fetchOlmAccount('content');
-      const signature = accountInfo.account.sign(stringifiedMessage);
-      await rustAPI.addReservedUsernames(stringifiedMessage, signature);
-    })(),
-  );
+  handleAsyncPromise(createAndSendReservedUsernameMessage([request.username]));
 
   return {
     id,
@@ -302,7 +286,30 @@
   }));
   const messageDatas = [...ashoatMessageDatas, ...privateMessageDatas];
   await Promise.all([createMessages(viewer, messageDatas)]);
+
+  handleAsyncPromise(createAndSendReservedUsernameMessage([request.address]));
+
   return id;
 }
 
+async function createAndSendReservedUsernameMessage(
+  payload: $ReadOnlyArray<string>,
+) {
+  const issuedAt = new Date().toISOString();
+  const reservedUsernameMessage: ReservedUsernameMessage = {
+    statement: 'Add the following usernames to reserved list',
+    payload,
+    issuedAt,
+  };
+  const stringifiedMessage = JSON.stringify(reservedUsernameMessage);
+
+  const [rustAPI, accountInfo] = await Promise.all([
+    getRustAPI(),
+    fetchOlmAccount('content'),
+  ]);
+  const signature = accountInfo.account.sign(stringifiedMessage);
+
+  await rustAPI.addReservedUsernames(stringifiedMessage, signature);
+}
+
 export { createAccount, processSIWEAccountCreation };
diff --git a/keyserver/src/cron/update-identity-reserved-usernames.js b/keyserver/src/cron/update-identity-reserved-usernames.js
--- a/keyserver/src/cron/update-identity-reserved-usernames.js
+++ b/keyserver/src/cron/update-identity-reserved-usernames.js
@@ -3,7 +3,6 @@
 import { getRustAPI } from 'rust-node-addon';
 
 import type { ReservedUsernameMessage } from 'lib/types/crypto-types.js';
-import { isValidEthereumAddress } from 'lib/utils/siwe-utils.js';
 
 import { fetchAllUsernames } from '../fetchers/user-fetchers.js';
 import { fetchOlmAccount } from '../updaters/olm-account-updater.js';
@@ -14,13 +13,10 @@
     getRustAPI(),
     fetchOlmAccount('content'),
   ]);
-  const filteredUsernames = usernames.filter(
-    username => !isValidEthereumAddress(username),
-  );
   const issuedAt = new Date().toISOString();
   const reservedUsernameMessage: ReservedUsernameMessage = {
     statement: 'Add the following usernames to reserved list',
-    payload: filteredUsernames,
+    payload: usernames,
     issuedAt,
   };
   const stringifiedMessage = JSON.stringify(reservedUsernameMessage);