diff --git a/modules/yieldoneBidAdapter.js b/modules/yieldoneBidAdapter.js
index 5852663dc99..655b331c7c3 100644
--- a/modules/yieldoneBidAdapter.js
+++ b/modules/yieldoneBidAdapter.js
@@ -113,6 +113,12 @@ export const spec = {
         payload.id5Id = id5id;
       }
 
+      // UID2.0
+      const uid2 = deepAccess(bidRequest, 'userId.uid2.id');
+      if (isStr(uid2) && !isEmpty(uid2)) {
+        payload.uid2id = uid2;
+      }
+
       return {
         method: 'GET',
         url: ENDPOINT_URL,
diff --git a/test/spec/modules/yieldoneBidAdapter_spec.js b/test/spec/modules/yieldoneBidAdapter_spec.js
index 983f67bcdd6..347ff417f60 100644
--- a/test/spec/modules/yieldoneBidAdapter_spec.js
+++ b/test/spec/modules/yieldoneBidAdapter_spec.js
@@ -475,6 +475,39 @@ describe('yieldoneBidAdapter', function () {
         expect(request[0].data.id5Id).to.equal('id5id_sample');
       });
     });
+
+    describe('UID2.0', function () {
+      it('dont send UID2.0 if undefined', function () {
+        const bidRequests = [
+          {
+            params: {placementId: '0'},
+          },
+          {
+            params: {placementId: '1'},
+            userId: {},
+          },
+          {
+            params: {placementId: '2'},
+            userId: undefined,
+          },
+        ];
+        const request = spec.buildRequests(bidRequests, bidderRequest);
+        expect(request[0].data).to.not.have.property('uid2id');
+        expect(request[1].data).to.not.have.property('uid2id');
+        expect(request[2].data).to.not.have.property('uid2id');
+      });
+
+      it('should send UID2.0 if available', function () {
+        const bidRequests = [
+          {
+            params: {placementId: '0'},
+            userId: {uid2: {id: 'uid2_sample'}},
+          },
+        ];
+        const request = spec.buildRequests(bidRequests, bidderRequest);
+        expect(request[0].data.uid2id).to.equal('uid2_sample');
+      });
+    });
   });
 
   describe('interpretResponse', function () {