diff --git a/js/background.js b/js/background.js
index f16ab1c8e5..283365e64d 100644
--- a/js/background.js
+++ b/js/background.js
@@ -1071,25 +1071,10 @@
   }
   function onConfiguration(ev) {
     const { configuration } = ev;
-    const {
-      readReceipts,
-      typingIndicators,
-      unidentifiedDeliveryIndicators,
-      linkPreviews,
-    } = configuration;
+    const { readReceipts, typingIndicators, linkPreviews } = configuration;
 
     storage.put('read-receipt-setting', readReceipts);
 
-    if (
-      unidentifiedDeliveryIndicators === true ||
-      unidentifiedDeliveryIndicators === false
-    ) {
-      storage.put(
-        'unidentifiedDeliveryIndicators',
-        unidentifiedDeliveryIndicators
-      );
-    }
-
     if (typingIndicators === true || typingIndicators === false) {
       storage.put('typing-indicators-setting', typingIndicators);
     }
diff --git a/js/models/conversations.js b/js/models/conversations.js
index 88011f182c..833e668652 100644
--- a/js/models/conversations.js
+++ b/js/models/conversations.js
@@ -86,9 +86,6 @@
       if (this.isPublic) {
         this.set('profileSharing', true);
       }
-
-      this.unset('unidentifiedDelivery');
-      this.unset('unidentifiedDeliveryUnrestricted');
       this.unset('hasFetchedProfile');
       this.unset('tokens');
 
diff --git a/js/models/messages.js b/js/models/messages.js
index 5682dad686..6cfe53a3c4 100644
--- a/js/models/messages.js
+++ b/js/models/messages.js
@@ -677,25 +677,10 @@
           : null,
       };
     },
-    isUnidentifiedDelivery(contactId, lookup) {
-      if (this.isIncoming()) {
-        return this.get('unidentifiedDeliveryReceived');
-      }
-
-      return Boolean(lookup[contactId]);
-    },
     async getPropsForMessageDetail() {
       const newIdentity = i18n('newIdentity');
       const OUTGOING_KEY_ERROR = 'OutgoingIdentityKeyError';
 
-      const unidentifiedLookup = (
-        this.get('unidentifiedDeliveries') || []
-      ).reduce((accumulator, item) => {
-        // eslint-disable-next-line no-param-reassign
-        accumulator[item] = true;
-        return accumulator;
-      }, Object.create(null));
-
       // We include numbers we didn't successfully send to so we can display errors.
       // Older messages don't have the recipients included on the message, so we fall
       //   back to the conversation's current recipients
@@ -726,9 +711,6 @@
           const isOutgoingKeyError = Boolean(
             _.find(errorsForContact, error => error.name === OUTGOING_KEY_ERROR)
           );
-          const isUnidentifiedDelivery =
-            storage.get('unidentifiedDeliveryIndicators') &&
-            this.isUnidentifiedDelivery(id, unidentifiedLookup);
 
           const contact = this.findAndFormatContact(id);
           return {
@@ -738,7 +720,6 @@
             status: this.getStatus(id) || this.getMessagePropStatus(),
             errors: errorsForContact,
             isOutgoingKeyError,
-            isUnidentifiedDelivery,
             isPrimaryDevice: true,
             profileName: contact.profileName,
           };
diff --git a/ts/components/conversation/MessageDetail.tsx b/ts/components/conversation/MessageDetail.tsx
index 98e9e7fb3d..cced52ede0 100644
--- a/ts/components/conversation/MessageDetail.tsx
+++ b/ts/components/conversation/MessageDetail.tsx
@@ -15,7 +15,6 @@ interface Contact {
   avatarPath?: string;
   color: string;
   isOutgoingKeyError: boolean;
-  isUnidentifiedDelivery: boolean;
 
   errors?: Array<Error>;
 
@@ -89,9 +88,6 @@ export class MessageDetail extends React.Component<Props> {
         )}
       />
     ) : null;
-    const unidentifiedDeliveryComponent = contact.isUnidentifiedDelivery ? (
-      <div className="module-message-detail__contact__unidentified-delivery-icon" />
-    ) : null;
 
     return (
       <div key={contact.phoneNumber} className="module-message-detail__contact">
@@ -113,7 +109,6 @@ export class MessageDetail extends React.Component<Props> {
           ))}
         </div>
         {errorComponent}
-        {unidentifiedDeliveryComponent}
         {statusComponent}
       </div>
     );
diff --git a/ts/receiver/dataMessage.ts b/ts/receiver/dataMessage.ts
index 9d757818e9..d0dac17b5b 100644
--- a/ts/receiver/dataMessage.ts
+++ b/ts/receiver/dataMessage.ts
@@ -311,7 +311,6 @@ export async function handleDataMessage(
     sourceDevice: 1,
     timestamp: _.toNumber(envelope.timestamp),
     receivedAt: envelope.receivedAt,
-    unidentifiedDeliveryReceived: envelope.unidentifiedDeliveryReceived,
     message,
   };
 
@@ -414,7 +413,6 @@ interface MessageCreationData {
   isPublic: boolean;
   receivedAt: number;
   sourceDevice: number; // always 1 isn't it?
-  unidentifiedDeliveryReceived: any; // ???
   source: boolean;
   serverId: string;
   message: any;
@@ -432,7 +430,6 @@ export function initIncomingMessage(data: MessageCreationData): MessageModel {
     isPublic,
     receivedAt,
     sourceDevice,
-    unidentifiedDeliveryReceived,
     source,
     serverId,
     message,
@@ -456,7 +453,6 @@ export function initIncomingMessage(data: MessageCreationData): MessageModel {
     serverTimestamp,
     received_at: receivedAt || Date.now(),
     conversationId: groupId ?? source,
-    unidentifiedDeliveryReceived, // +
     type,
     direction: 'incoming', // +
     unread: 1, // +
@@ -588,11 +584,7 @@ export async function handleMessageEvent(event: MessageEvent): Promise<void> {
 
   const isOurDevice = await UserUtils.isUs(source);
 
-  const shouldSendReceipt =
-    isIncoming &&
-    data.unidentifiedDeliveryReceived &&
-    !isGroupMessage &&
-    !isOurDevice;
+  const shouldSendReceipt = isIncoming && !isGroupMessage && !isOurDevice;
 
   if (shouldSendReceipt) {
     sendDeliveryReceipt(source, data.timestamp);
diff --git a/ts/receiver/types.ts b/ts/receiver/types.ts
index 3adaa3e50b..431cbb5ffe 100644
--- a/ts/receiver/types.ts
+++ b/ts/receiver/types.ts
@@ -11,6 +11,5 @@ export interface Quote {
 export interface EnvelopePlus extends SignalService.Envelope {
   senderIdentity: string; // Sender's pubkey after it's been decrypted (for medium groups)
   receivedAt: number; // We only seem to set this for public messages?
-  unidentifiedDeliveryReceived: boolean;
   id: string;
 }
diff --git a/ts/state/ducks/conversations.ts b/ts/state/ducks/conversations.ts
index f2173b2af9..cfc98b3dab 100644
--- a/ts/state/ducks/conversations.ts
+++ b/ts/state/ducks/conversations.ts
@@ -416,7 +416,6 @@ const toPickFromMessageModel = [
   'isIncoming',
   'findAndFormatContact',
   'findContact',
-  'isUnidentifiedDelivery',
   'getStatus',
   'getMessagePropStatus',
   'hasErrors',