diff --git a/modules/rubiconBidAdapter.js b/modules/rubiconBidAdapter.js
index 9f5c2ec10d5..b5d03133dde 100644
--- a/modules/rubiconBidAdapter.js
+++ b/modules/rubiconBidAdapter.js
@@ -316,6 +316,12 @@ export const spec = {
         }
       }
 
+      // set user.id value from config value
+      const configUserId = config.getConfig('user.id');
+      if (configUserId) {
+        utils.deepSetValue(data, 'user.id', configUserId);
+      }
+
       if (config.getConfig('coppa') === true) {
         utils.deepSetValue(data, 'regs.coppa', 1);
       }
@@ -587,6 +593,12 @@ export const spec = {
       }
     }
 
+    // set ppuid value from config value
+    const configUserId = config.getConfig('user.id');
+    if (configUserId) {
+      data['ppuid'] = configUserId;
+    }
+
     if (bidderRequest.gdprConsent) {
       // add 'gdpr' only if 'gdprApplies' is defined
       if (typeof bidderRequest.gdprConsent.gdprApplies === 'boolean') {
diff --git a/test/spec/modules/rubiconBidAdapter_spec.js b/test/spec/modules/rubiconBidAdapter_spec.js
index 49a3f60bac7..cbc3e5bbd8e 100644
--- a/test/spec/modules/rubiconBidAdapter_spec.js
+++ b/test/spec/modules/rubiconBidAdapter_spec.js
@@ -1387,7 +1387,24 @@ describe('the rubicon adapter', function () {
               expect(data['eid_sharedid.org']).to.equal('1111^3^2222');
             });
           });
-        })
+
+          describe('Config user.id support', function () {
+            it('should send ppuid when config defines user.id', function () {
+              config.setConfig({ user: { id: '123' } });
+              const clonedBid = utils.deepClone(bidderRequest.bids[0]);
+              clonedBid.userId = {
+                sharedid: {
+                  id: '1111',
+                  third: '2222'
+                }
+              };
+              let [request] = spec.buildRequests([clonedBid], bidderRequest);
+              let data = parseQuery(request.data);
+
+              expect(data['ppuid']).to.equal('123');
+            });
+          });
+        });
 
         describe('Prebid AdSlot', function () {
           beforeEach(function () {
@@ -2023,6 +2040,75 @@ describe('the rubicon adapter', function () {
           const [request] = spec.buildRequests(bidderRequest.bids, bidderRequest);
           expect(request.data.ext.prebid.bidders.rubicon.integration).to.equal('testType');
         });
+
+        it('should pass the user.id provided in the config', function () {
+          config.setConfig({ user: { id: '123' } });
+          createVideoBidderRequest();
+
+          sandbox.stub(Date, 'now').callsFake(() =>
+            bidderRequest.auctionStart + 100
+          );
+
+          let [request] = spec.buildRequests(bidderRequest.bids, bidderRequest);
+          let post = request.data;
+
+          expect(post).to.have.property('imp')
+          // .with.length.of(1);
+          let imp = post.imp[0];
+          expect(imp.id).to.equal(bidderRequest.bids[0].adUnitCode);
+          expect(imp.exp).to.equal(300);
+          expect(imp.video.w).to.equal(640);
+          expect(imp.video.h).to.equal(480);
+          expect(imp.video.pos).to.equal(1);
+          expect(imp.video.context).to.equal('instream');
+          expect(imp.video.minduration).to.equal(15);
+          expect(imp.video.maxduration).to.equal(30);
+          expect(imp.video.startdelay).to.equal(0);
+          expect(imp.video.skip).to.equal(1);
+          expect(imp.video.skipafter).to.equal(15);
+          expect(imp.ext.rubicon.video.playerWidth).to.equal(640);
+          expect(imp.ext.rubicon.video.playerHeight).to.equal(480);
+          expect(imp.ext.rubicon.video.size_id).to.equal(201);
+          expect(imp.ext.rubicon.video.language).to.equal('en');
+          // Also want it to be in post.site.content.language
+          expect(post.site.content.language).to.equal('en');
+          expect(imp.ext.rubicon.video.skip).to.equal(1);
+          expect(imp.ext.rubicon.video.skipafter).to.equal(15);
+          expect(imp.ext.prebid.auctiontimestamp).to.equal(1472239426000);
+          expect(post.user.ext.consent).to.equal('BOJ/P2HOJ/P2HABABMAAAAAZ+A==');
+          expect(post.user.ext.eids[0].source).to.equal('liveintent.com');
+          expect(post.user.ext.eids[0].uids[0].id).to.equal('0000-1111-2222-3333');
+          expect(post.user.ext.tpid).that.is.an('object');
+          expect(post.user.ext.tpid.source).to.equal('liveintent.com');
+          expect(post.user.ext.tpid.uid).to.equal('0000-1111-2222-3333');
+          // LiveRamp should exist
+          expect(post.user.ext.eids[1].source).to.equal('liveramp_idl');
+          expect(post.user.ext.eids[1].uids[0].id).to.equal('1111-2222-3333-4444');
+          // SharedId should exist
+          expect(post.user.ext.eids[2].source).to.equal('sharedid.org');
+          expect(post.user.ext.eids[2].uids[0].id).to.equal('1111');
+          expect(post.user.ext.eids[2].uids[0].atype).to.equal(3);
+          expect(post.user.ext.eids[2].uids[0].ext.third).to.equal('2222');
+
+          expect(post.rp).that.is.an('object');
+          expect(post.rp.target).that.is.an('object');
+          expect(post.rp.target.LIseg).that.is.an('array');
+          expect(post.rp.target.LIseg[0]).to.equal('segA');
+          expect(post.rp.target.LIseg[1]).to.equal('segB');
+
+          // Config user.id
+          expect(post.user.id).to.equal('123');
+
+          expect(post.regs.ext.gdpr).to.equal(1);
+          expect(post.regs.ext.us_privacy).to.equal('1NYN');
+          expect(post).to.have.property('ext').that.is.an('object');
+          expect(post.ext.prebid.targeting.includewinners).to.equal(true);
+          expect(post.ext.prebid).to.have.property('cache').that.is.an('object');
+          expect(post.ext.prebid.cache).to.have.property('vastxml').that.is.an('object');
+          expect(post.ext.prebid.cache.vastxml).to.have.property('returnCreative').that.is.an('boolean');
+          expect(post.ext.prebid.cache.vastxml.returnCreative).to.equal(false);
+          expect(post.ext.prebid.bidders.rubicon.integration).to.equal(PBS_INTEGRATION);
+        })
       });
 
       describe('combineSlotUrlParams', function () {