diff --git a/modules/criteoBidAdapter.js b/modules/criteoBidAdapter.js
index 6eca0c95dde..eca1000536c 100644
--- a/modules/criteoBidAdapter.js
+++ b/modules/criteoBidAdapter.js
@@ -8,13 +8,14 @@ import { verify } from 'criteo-direct-rsa-validate/build/verify.js';
 import { getStorageManager } from '../src/storageManager.js';
 
 const GVLID = 91;
-export const ADAPTER_VERSION = 27;
+export const ADAPTER_VERSION = 28;
 const BIDDER_CODE = 'criteo';
 const CDB_ENDPOINT = 'https://bidder.criteo.com/cdb';
 const CRITEO_VENDOR_ID = 91;
 const PROFILE_ID_INLINE = 207;
 export const PROFILE_ID_PUBLISHERTAG = 185;
 const storage = getStorageManager(GVLID);
+const LOG_PREFIX = 'Criteo: ';
 
 // Unminified source code can be found in: https://github.com/Prebid-org/prebid-js-external-js-criteo/blob/master/dist/prod.js
 const PUBLISHER_TAG_URL = 'https://static.criteo.net/js/ld/publishertag.prebid.js';
@@ -245,6 +246,16 @@ function buildCdbUrl(context) {
   return url;
 }
 
+function checkNativeSendId(bidRequest) {
+  return !(bidRequest.nativeParams &&
+    ((bidRequest.nativeParams.image && bidRequest.nativeParams.image.sendId !== true) ||
+      (bidRequest.nativeParams.icon && bidRequest.nativeParams.icon.sendId !== true) ||
+      (bidRequest.nativeParams.clickUrl && bidRequest.nativeParams.clickUrl.sendId !== true) ||
+      (bidRequest.nativeParams.displayUrl && bidRequest.nativeParams.displayUrl.sendId !== true) ||
+      (bidRequest.nativeParams.privacyLink && bidRequest.nativeParams.privacyLink.sendId !== true) ||
+      (bidRequest.nativeParams.privacyIcon && bidRequest.nativeParams.privacyIcon.sendId !== true)));
+}
+
 /**
  * @param {CriteoContext} context
  * @param {BidRequest[]} bidRequests
@@ -279,6 +290,9 @@ function buildCdbRequest(context, bidRequests, bidderRequest) {
       }
       if (bidRequest.params.nativeCallback || utils.deepAccess(bidRequest, `mediaTypes.${NATIVE}`)) {
         slot.native = true;
+        if (!checkNativeSendId(bidRequest)) {
+          utils.logWarn(LOG_PREFIX + 'all native assets containing URL should be sent as placeholders with sendId(icon, image, clickUrl, displayUrl, privacyLink, privacyIcon)');
+        }
       }
       if (hasVideoMediaType(bidRequest)) {
         const video = {
@@ -287,7 +301,7 @@ function buildCdbRequest(context, bidRequests, bidderRequest) {
           protocols: bidRequest.mediaTypes.video.protocols,
           maxduration: bidRequest.mediaTypes.video.maxduration,
           api: bidRequest.mediaTypes.video.api
-        }
+        };
 
         video.skip = bidRequest.params.video.skip;
         video.placement = bidRequest.params.video.placement;
diff --git a/test/spec/modules/criteoBidAdapter_spec.js b/test/spec/modules/criteoBidAdapter_spec.js
index b1319871b34..10f9bc935eb 100755
--- a/test/spec/modules/criteoBidAdapter_spec.js
+++ b/test/spec/modules/criteoBidAdapter_spec.js
@@ -1,5 +1,5 @@
 import { expect } from 'chai';
-import { tryGetCriteoFastBid, spec, PROFILE_ID_PUBLISHERTAG, ADAPTER_VERSION, PUBLISHER_TAG_URL } from 'modules/criteoBidAdapter.js';
+import { tryGetCriteoFastBid, spec, PROFILE_ID_PUBLISHERTAG, ADAPTER_VERSION } from 'modules/criteoBidAdapter.js';
 import { createBid } from 'src/bidfactory.js';
 import CONSTANTS from 'src/constants.json';
 import * as utils from 'src/utils.js';
@@ -533,7 +533,7 @@ describe('The Criteo bidding adapter', function () {
       expect(ortbRequest.gdprConsent).to.equal(undefined);
     });
 
-    it('should properly build request with undefined gdpr consent fields when they are not provided', function () {
+    it('should properly build a request with undefined gdpr consent fields when they are not provided', function () {
       const bidRequests = [
         {
           bidder: 'criteo',
@@ -1166,6 +1166,132 @@ describe('The Criteo bidding adapter', function () {
     });
   });
 
+  describe('when pubtag prebid adapter is not available', function () {
+    it('should not warn if sendId is provided on required fields for native bidRequest', () => {
+      const bidderRequest = { };
+      const bidRequestsWithSendId = [
+        {
+          bidder: 'criteo',
+          adUnitCode: 'bid-123',
+          transactionId: 'transaction-123',
+          sizes: [[728, 90]],
+          params: {
+            zoneId: 123,
+            publisherSubId: '123',
+            nativeCallback: function() {}
+          },
+          nativeParams: {
+            image: {
+              sendId: true
+            },
+            icon: {
+              sendId: true
+            },
+            clickUrl: {
+              sendId: true
+            },
+            displayUrl: {
+              sendId: true
+            },
+            privacyLink: {
+              sendId: true
+            },
+            privacyIcon: {
+              sendId: true
+            }
+          }
+        }
+      ];
+
+      utilsMock.expects('logWarn').withArgs('Criteo: all native assets containing URL should be sent as placeholders with sendId(icon, image, clickUrl, displayUrl, privacyLink, privacyIcon)').never();
+      const request = spec.buildRequests(bidRequestsWithSendId, bidderRequest);
+      utilsMock.verify();
+    });
+
+    it('should warn only once if sendId is not provided on required fields for native bidRequest', () => {
+      const bidderRequest = { };
+      const bidRequests = [
+        {
+          bidder: 'criteo',
+          adUnitCode: 'bid-123',
+          transactionId: 'transaction-123',
+          sizes: [[728, 90]],
+          params: {
+            zoneId: 123,
+            publisherSubId: '123',
+            nativeCallback: function() {}
+          },
+        },
+        {
+          bidder: 'criteo',
+          adUnitCode: 'bid-456',
+          transactionId: 'transaction-456',
+          sizes: [[728, 90]],
+          params: {
+            zoneId: 456,
+            publisherSubId: '456',
+            nativeCallback: function() {}
+          },
+        },
+      ];
+
+      const nativeParamsWithoutSendId = [
+        {
+          nativeParams: {
+            image: {
+              sendId: false
+            },
+          }
+        },
+        {
+          nativeParams: {
+            icon: {
+              sendId: false
+            },
+          }
+        },
+        {
+          nativeParams: {
+            clickUrl: {
+              sendId: false
+            },
+          }
+        },
+        {
+          nativeParams: {
+            displayUrl: {
+              sendId: false
+            },
+          }
+        },
+        {
+          nativeParams: {
+            privacyLink: {
+              sendId: false
+            },
+          }
+        },
+        {
+          nativeParams: {
+            privacyIcon: {
+              sendId: false
+            },
+          }
+        }
+      ];
+
+      utilsMock.expects('logWarn')
+        .withArgs('Criteo: all native assets containing URL should be sent as placeholders with sendId(icon, image, clickUrl, displayUrl, privacyLink, privacyIcon)')
+        .exactly(nativeParamsWithoutSendId.length * bidRequests.length);
+      nativeParamsWithoutSendId.forEach(nativeParams => {
+        let transformedBidRequests = {...bidRequests};
+        transformedBidRequests = [Object.assign(transformedBidRequests[0], nativeParams), Object.assign(transformedBidRequests[1], nativeParams)];
+        spec.buildRequests(transformedBidRequests, bidderRequest);
+      });
+      utilsMock.verify();
+    });
+  });
+
   describe('when pubtag prebid adapter is available', function () {
     it('should forward response to pubtag when calling interpretResponse', () => {
       const response = {};