diff --git a/frontend/benefit/applicant/public/locales/en/common.json b/frontend/benefit/applicant/public/locales/en/common.json
index 6021973d79..cf62f83b02 100644
--- a/frontend/benefit/applicant/public/locales/en/common.json
+++ b/frontend/benefit/applicant/public/locales/en/common.json
@@ -780,7 +780,7 @@
     "isSecure": "Messages are encrypted",
     "noMessages": "No messages",
     "close": "Close",
-    "cannotWriteNewMessages": "Your application is being processed. You cannot write a new message right now. Please wait for your application to be processed."
+    "cannotWriteNewMessages": "Your application has progressed to the decision-making stage or it has already been processed. You can no longer write a new message."
   },
   "application": {
     "tooltipShowInfo": "Show information"
diff --git a/frontend/benefit/applicant/public/locales/fi/common.json b/frontend/benefit/applicant/public/locales/fi/common.json
index 916d3f9ebf..3f381a22d2 100644
--- a/frontend/benefit/applicant/public/locales/fi/common.json
+++ b/frontend/benefit/applicant/public/locales/fi/common.json
@@ -780,7 +780,7 @@
     "isSecure": "Viestit ovat salattuja",
     "noMessages": "Ei viestejä",
     "close": "Sulje",
-    "cannotWriteNewMessages": "Hakemuksesi käsittely on käynnissä. Et voi kirjoittaa uutta viestiä juuri nyt. Ole hyvä ja odota hakemuksesi käsittelyä."
+    "cannotWriteNewMessages": "Hakemuksesi käsittely on edennyt päätöksentekoon tai se on jo käsitelty. Et voi enää kirjoittaa uutta viestiä."
   },
   "application": {
     "tooltipShowInfo": "Näytä info"
diff --git a/frontend/benefit/applicant/public/locales/sv/common.json b/frontend/benefit/applicant/public/locales/sv/common.json
index 5365931dc2..c608c345c8 100644
--- a/frontend/benefit/applicant/public/locales/sv/common.json
+++ b/frontend/benefit/applicant/public/locales/sv/common.json
@@ -780,7 +780,7 @@
     "isSecure": "Meddelandena är skyddade",
     "noMessages": "Inga meddelanden",
     "close": "Stäng",
-    "cannotWriteNewMessages": "Din ansökan behandlas. Du kan inte skriva ett nytt meddelande just nu. Vänta tills din ansökan behandlas."
+    "cannotWriteNewMessages": "Din ansökan har gått vidare till beslutsfattandet eller har redan behandlats. Du kan inte längre skriva ett nytt meddelande."
   },
   "application": {
     "tooltipShowInfo": "Visa information"
diff --git a/frontend/benefit/applicant/src/components/header/useHeader.ts b/frontend/benefit/applicant/src/components/header/useHeader.ts
index 30f35f2bee..a6625238f0 100644
--- a/frontend/benefit/applicant/src/components/header/useHeader.ts
+++ b/frontend/benefit/applicant/src/components/header/useHeader.ts
@@ -76,8 +76,12 @@ const useHeader = (): ExtendedComponentProps => {
   );
   useEffect(() => {
     setHasMessenger(
-      status === APPLICATION_STATUSES.INFO_REQUIRED ||
-        status === APPLICATION_STATUSES.HANDLING
+      [
+        APPLICATION_STATUSES.INFO_REQUIRED,
+        APPLICATION_STATUSES.HANDLING,
+        APPLICATION_STATUSES.REJECTED,
+        APPLICATION_STATUSES.ACCEPTED,
+      ].includes(status)
     );
   }, [status, setHasMessenger]);