diff --git a/models/contact/src/index.ts b/models/contact/src/index.ts
index 0cfeacf2dbd..a0291182995 100644
--- a/models/contact/src/index.ts
+++ b/models/contact/src/index.ts
@@ -14,7 +14,7 @@
 // limitations under the License.
 //
 
-import activity from '@hcengineering/activity'
+import activity, { type ActivityMessageControl } from '@hcengineering/activity'
 import { type Role, type Card } from '@hcengineering/card'
 import {
   AvatarType,
@@ -340,6 +340,13 @@ export function createModel (builder: Builder): void {
     preposition: contact.string.For
   })
 
+  // Prevent leaking private social identifiers (emails, external handles) via activity updates.
+  builder.createDoc<ActivityMessageControl<Person>>(activity.class.ActivityMessageControl, core.space.Model, {
+    objectClass: contact.class.Person,
+    skip: [],
+    skipFields: ['socialIds']
+  })
+
   builder.mixin(contact.mixin.Employee, core.class.Class, activity.mixin.ActivityDoc, {
     preposition: contact.string.For
   })
diff --git a/plugins/contact-resources/src/components/SocialIdentityPresenter.svelte b/plugins/contact-resources/src/components/SocialIdentityPresenter.svelte
index 0d9d88e72e3..65ed3fe7a3e 100644
--- a/plugins/contact-resources/src/components/SocialIdentityPresenter.svelte
+++ b/plugins/contact-resources/src/components/SocialIdentityPresenter.svelte
@@ -15,7 +15,7 @@
 <script lang="ts">
   import { onMount } from 'svelte'
   import { Icon, Label, tooltip } from '@hcengineering/ui'
-  import contact, { SocialIdentity, SocialIdentityProvider } from '@hcengineering/contact'
+  import contact, { SocialIdentity, SocialIdentityProvider, getCurrentEmployee } from '@hcengineering/contact'
   import { getClient } from '@hcengineering/presentation'
 
   export let value: SocialIdentity
@@ -23,6 +23,7 @@
   export let shouldShowAvatar = true
 
   const client = getClient()
+  let isOwner = false
 
   onMount(() => {
     if (socialIdProvider == null) {
@@ -31,6 +32,10 @@
   })
 
   $: icon = socialIdProvider?.icon ?? contact.icon.Profile
+  $: {
+    const me = getCurrentEmployee()
+    isOwner = me != null && value.attachedTo === me
+  }
 </script>
 
 {#if socialIdProvider != null}
@@ -46,8 +51,12 @@
     </div>
 
     <div class="flex-col flex-gap-0-5">
-      <div>{value.displayValue ?? value.value}</div>
-      {#if shouldShowAvatar}
+      {#if isOwner}
+        <div>{value.displayValue ?? value.value}</div>
+        {#if shouldShowAvatar}
+          <div class="type"><Label label={socialIdProvider.label} /></div>
+        {/if}
+      {:else}
         <div class="type"><Label label={socialIdProvider.label} /></div>
       {/if}
     </div>