diff --git a/modules/sparteoBidAdapter.js b/modules/sparteoBidAdapter.js
index 93353c5dda7..bfb527d46f2 100644
--- a/modules/sparteoBidAdapter.js
+++ b/modules/sparteoBidAdapter.js
@@ -8,6 +8,8 @@ const GVLID = 1028;
 const TTL = 60;
 const HTTP_METHOD = 'POST';
 const REQUEST_URL = 'https://bid.sparteo.com/auction';
+const USER_SYNC_URL_IFRAME = 'https://sync.sparteo.com/sync/iframe.html?from=prebidjs';
+let isSynced = window.sparteoCrossfire?.started || false;
 
 const converter = ortbConverter({
   context: {
@@ -60,7 +62,7 @@ export const spec = {
    * @param {BidRequest} bid The bid params to validate.
    * @return boolean True if this is a valid bid, and false otherwise.
    */
-  isBidRequestValid: function(bid) {
+  isBidRequestValid: function (bid) {
     let bannerParams = deepAccess(bid, 'mediaTypes.banner');
     let videoParams = deepAccess(bid, 'mediaTypes.video');
 
@@ -106,7 +108,7 @@ export const spec = {
     return true;
   },
 
-  buildRequests: function(bidRequests, bidderRequest) {
+  buildRequests: function (bidRequests, bidderRequest) {
     const payload = converter.toORTB({bidRequests, bidderRequest})
 
     return {
@@ -116,23 +118,49 @@ export const spec = {
     };
   },
 
-  interpretResponse: function(serverResponse, requests) {
+  interpretResponse: function (serverResponse, requests) {
     const bids = converter.fromORTB({response: serverResponse.body, request: requests.data}).bids;
 
     return bids;
   },
 
-  getUserSyncs: function(syncOptions, serverResponses, gdprConsent, uspConsent) {},
+  getUserSyncs: function (syncOptions, serverResponses, gdprConsent, uspConsent) {
+    let syncurl = '';
 
-  onTimeout: function(timeoutData) {},
+    if (!isSynced && !window.sparteoCrossfire?.started) {
+      // Attaching GDPR Consent Params in UserSync url
+      if (gdprConsent) {
+        syncurl += '&gdpr=' + (gdprConsent.gdprApplies ? 1 : 0);
+        syncurl += '&gdpr_consent=' + encodeURIComponent(gdprConsent.consentString || '');
+      }
+      if (uspConsent && uspConsent.consentString) {
+        syncurl += `&usp_consent=${uspConsent.consentString}`;
+      }
+
+      if (syncOptions.iframeEnabled) {
+        isSynced = true;
+
+        window.sparteoCrossfire = {
+          started: true
+        };
+
+        return [{
+          type: 'iframe',
+          url: USER_SYNC_URL_IFRAME + syncurl
+        }];
+      }
+    }
+  },
+
+  onTimeout: function (timeoutData) {},
 
-  onBidWon: function(bid) {
+  onBidWon: function (bid) {
     if (bid && bid.nurl) {
       triggerPixel(bid.nurl, null);
     }
   },
 
-  onSetTargeting: function(bid) {}
+  onSetTargeting: function (bid) {}
 };
 
 registerBidder(spec);
diff --git a/test/spec/modules/sparteoBidAdapter_spec.js b/test/spec/modules/sparteoBidAdapter_spec.js
index 71191b44a29..293f7da30a1 100644
--- a/test/spec/modules/sparteoBidAdapter_spec.js
+++ b/test/spec/modules/sparteoBidAdapter_spec.js
@@ -6,6 +6,7 @@ const CURRENCY = 'EUR';
 const TTL = 60;
 const HTTP_METHOD = 'POST';
 const REQUEST_URL = 'https://bid.sparteo.com/auction';
+const USER_SYNC_URL_IFRAME = 'https://sync.sparteo.com/sync/iframe.html?from=prebidjs';
 
 const VALID_BID_BANNER = {
   bidder: 'sparteo',
@@ -438,4 +439,29 @@ describe('SparteoAdapter', function () {
       });
     });
   });
+
+  describe('getUserSyncs', function() {
+    describe('Check methods succeed', function () {
+      it('should return the sync url', function() {
+        const syncOptions = {
+          'iframeEnabled': true,
+          'pixelEnabled': false
+        };
+        const gdprConsent = {
+          gdprApplies: 1,
+          consentString: 'tcfv2'
+        };
+        const uspConsent = {
+          consentString: '1Y---'
+        };
+
+        const syncUrls = [{
+          type: 'iframe',
+          url: USER_SYNC_URL_IFRAME + '&gdpr=1&gdpr_consent=tcfv2&usp_consent=1Y---'
+        }];
+
+        expect(adapter.getUserSyncs(syncOptions, null, gdprConsent, uspConsent)).to.deep.equal(syncUrls);
+      });
+    });
+  });
 });