diff --git a/modules/visxBidAdapter.js b/modules/visxBidAdapter.js
index 2f9ec73c569..15334e46e31 100644
--- a/modules/visxBidAdapter.js
+++ b/modules/visxBidAdapter.js
@@ -15,8 +15,11 @@ const LOG_ERROR_MESS = {
   emptySeatbid: 'Seatbid array from response has an empty item',
   emptyResponse: 'Response is empty',
   hasEmptySeatbidArray: 'Response has empty seatbid array',
-  hasNoArrayOfBids: 'Seatbid from response has no array of bid objects - '
+  hasNoArrayOfBids: 'Seatbid from response has no array of bid objects - ',
+  notAllowedCurrency: 'Currency is not supported - ',
+  currencyMismatch: 'Currency from the request is not match currency from the response - '
 };
+const currencyWhiteList = ['EUR', 'USD', 'GBP', 'PLN'];
 export const spec = {
   code: BIDDER_CODE,
   isBidRequestValid: function(bid) {
@@ -34,6 +37,11 @@ export const spec = {
       DEFAULT_CUR;
     let reqId;
 
+    if (currencyWhiteList.indexOf(currency) === -1) {
+      utils.logError(LOG_ERROR_MESS.notAllowedCurrency + currency);
+      return;
+    }
+
     bids.forEach(bid => {
       reqId = bid.bidderRequestId;
       const {params: {uid}, adUnitCode} = bid;
@@ -78,7 +86,7 @@ export const spec = {
 
     if (bidderRequest) {
       if (bidderRequest.refererInfo && bidderRequest.refererInfo.referer) {
-        payload.u = encodeURIComponent(bidderRequest.refererInfo.referer);
+        payload.u = bidderRequest.refererInfo.referer;
       }
       if (bidderRequest.gdprConsent) {
         if (bidderRequest.gdprConsent.consentString) {
@@ -158,43 +166,48 @@ function _addBidResponse(serverBid, bidsMap, currency, bidResponses, bidsWithout
   if (!serverBid.auid) errorMessage = LOG_ERROR_MESS.noAuid + JSON.stringify(serverBid);
   if (!serverBid.adm) errorMessage = LOG_ERROR_MESS.noAdm + JSON.stringify(serverBid);
   else {
+    const reqCurrency = currency || DEFAULT_CUR;
     const awaitingBids = bidsMap[serverBid.auid];
     if (awaitingBids) {
-      const sizeId = bidsWithoutSizeMatching ? `${serverBid.w}x${serverBid.h}` : Object.keys(awaitingBids)[0];
-      if (awaitingBids[sizeId]) {
-        const slot = awaitingBids[sizeId][0];
-
-        const bid = slot.bids.shift();
-        bidResponses.push({
-          requestId: bid.bidId,
-          bidderCode: spec.code,
-          cpm: serverBid.price,
-          width: serverBid.w,
-          height: serverBid.h,
-          creativeId: serverBid.auid,
-          currency: currency || DEFAULT_CUR,
-          netRevenue: true,
-          ttl: TIME_TO_LIVE,
-          ad: serverBid.adm,
-          dealId: serverBid.dealid
-        });
-
-        if (!slot.bids.length) {
-          slot.parents.forEach(({parent, key, uid}) => {
-            const index = parent[key].indexOf(slot);
-            if (index > -1) {
-              parent[key].splice(index, 1);
-            }
-            if (!parent[key].length) {
-              delete parent[key];
-              if (!utils.getKeys(parent).length) {
-                delete bidsMap[uid];
-              }
-            }
+      if (serverBid.cur && serverBid.cur !== reqCurrency) {
+        errorMessage = LOG_ERROR_MESS.currencyMismatch + reqCurrency + ' - ' + serverBid.cur;
+      } else {
+        const sizeId = bidsWithoutSizeMatching ? `${serverBid.w}x${serverBid.h}` : Object.keys(awaitingBids)[0];
+        if (awaitingBids[sizeId]) {
+          const slot = awaitingBids[sizeId][0];
+
+          const bid = slot.bids.shift();
+          bidResponses.push({
+            requestId: bid.bidId,
+            bidderCode: spec.code,
+            cpm: serverBid.price,
+            width: serverBid.w,
+            height: serverBid.h,
+            creativeId: serverBid.auid,
+            currency: reqCurrency,
+            netRevenue: true,
+            ttl: TIME_TO_LIVE,
+            ad: serverBid.adm,
+            dealId: serverBid.dealid
           });
+
+          if (!slot.bids.length) {
+            slot.parents.forEach(({parent, key, uid}) => {
+              const index = parent[key].indexOf(slot);
+              if (index > -1) {
+                parent[key].splice(index, 1);
+              }
+              if (!parent[key].length) {
+                delete parent[key];
+                if (!utils.getKeys(parent).length) {
+                  delete bidsMap[uid];
+                }
+              }
+            });
+          }
+        } else {
+          bidsWithoutSizeMatching && bidsWithoutSizeMatching.push(serverBid);
         }
-      } else {
-        bidsWithoutSizeMatching && bidsWithoutSizeMatching.push(serverBid);
       }
     } else {
       errorMessage = LOG_ERROR_MESS.noPlacementCode + serverBid.auid;
diff --git a/test/spec/modules/visxBidAdapter_spec.js b/test/spec/modules/visxBidAdapter_spec.js
index 09ce92479f9..167d54e37a6 100755
--- a/test/spec/modules/visxBidAdapter_spec.js
+++ b/test/spec/modules/visxBidAdapter_spec.js
@@ -45,7 +45,7 @@ describe('VisxAdapter', function () {
         referer: 'http://example.com'
       }
     };
-    const encodedReferrer = encodeURIComponent(bidderRequest.refererInfo.referer);
+    const referrer = bidderRequest.refererInfo.referer;
     let bidRequests = [
       {
         'bidder': 'visx',
@@ -86,7 +86,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests([bidRequests[0]], bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535');
       expect(payload).to.have.property('sizes', '300x250,300x600');
@@ -98,7 +98,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
@@ -111,7 +111,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
@@ -124,7 +124,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
@@ -138,7 +138,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
@@ -149,16 +149,16 @@ describe('VisxAdapter', function () {
 
     it('should add currency from currency.bidderCurrencyDefault', function () {
       const getConfigStub = sinon.stub(config, 'getConfig').callsFake(
-        arg => arg === 'currency.bidderCurrencyDefault.visx' ? 'JPY' : 'USD');
+        arg => arg === 'currency.bidderCurrencyDefault.visx' ? 'GBP' : 'USD');
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
       expect(payload).to.have.property('r', '22edbae2733bf6');
-      expect(payload).to.have.property('cur', 'JPY');
+      expect(payload).to.have.property('cur', 'GBP');
       getConfigStub.restore();
     });
 
@@ -168,7 +168,7 @@ describe('VisxAdapter', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest);
       const payload = request.data;
       expect(payload).to.be.an('object');
-      expect(payload).to.have.property('u', encodedReferrer);
+      expect(payload).to.have.property('u', referrer);
       expect(payload).to.have.property('pt', 'net');
       expect(payload).to.have.property('auids', '903535,903535,903536');
       expect(payload).to.have.property('sizes', '300x250,300x600,728x90');
@@ -204,11 +204,11 @@ describe('VisxAdapter', function () {
 
   describe('interpretResponse', function () {
     const responses = [
-      {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300}], 'seat': '1'},
-      {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903536, 'h': 600, 'w': 300}], 'seat': '1'},
-      {'bid': [{'price': 0.15, 'adm': '<div>test content 3</div>', 'auid': 903535, 'h': 90, 'w': 728}], 'seat': '1'},
-      {'bid': [{'price': 0, 'auid': 903537, 'h': 250, 'w': 300}], 'seat': '1'},
-      {'bid': [{'price': 0, 'adm': '<div>test content 5</div>', 'h': 250, 'w': 300}], 'seat': '1'},
+      {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+      {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903536, 'h': 600, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+      {'bid': [{'price': 0.15, 'adm': '<div>test content 3</div>', 'auid': 903535, 'h': 90, 'w': 728, 'cur': 'EUR'}], 'seat': '1'},
+      {'bid': [{'price': 0, 'auid': 903537, 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+      {'bid': [{'price': 0, 'adm': '<div>test content 5</div>', 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
       undefined,
       {'bid': [], 'seat': '1'},
       {'seat': '1'},
@@ -346,7 +346,7 @@ describe('VisxAdapter', function () {
           'auctionId': '1cbd2feafe5e8b',
         }
       ];
-      const getConfigStub = sinon.stub(config, 'getConfig').returns('JPY');
+      const getConfigStub = sinon.stub(config, 'getConfig').returns('PLN');
       const request = spec.buildRequests(bidRequests);
       const expectedResponse = [
         {
@@ -358,13 +358,15 @@ describe('VisxAdapter', function () {
           'height': 250,
           'ad': '<div>test content 1</div>',
           'bidderCode': 'visx',
-          'currency': 'JPY',
+          'currency': 'PLN',
           'netRevenue': true,
           'ttl': 360,
         }
       ];
 
-      const result = spec.interpretResponse({'body': {'seatbid': [responses[0]]}}, request);
+      const response = Object.assign({}, responses[0]);
+      Object.assign(response.bid[0], {'cur': 'PLN'});
+      const result = spec.interpretResponse({'body': {'seatbid': [response]}}, request);
       expect(result).to.deep.equal(expectedResponse);
       getConfigStub.restore();
     });
@@ -412,11 +414,11 @@ describe('VisxAdapter', function () {
 
     it('complicated case', function () {
       const fullResponse = [
-        {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300}], 'seat': '1'},
-        {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903536, 'h': 600, 'w': 300}], 'seat': '1'},
-        {'bid': [{'price': 0.15, 'adm': '<div>test content 3</div>', 'auid': 903535, 'h': 90, 'w': 728}], 'seat': '1'},
-        {'bid': [{'price': 0.15, 'adm': '<div>test content 4</div>', 'auid': 903535, 'h': 600, 'w': 300}], 'seat': '1'},
-        {'bid': [{'price': 0.5, 'adm': '<div>test content 5</div>', 'auid': 903536, 'h': 600, 'w': 350}], 'seat': '1'},
+        {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+        {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903536, 'h': 600, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+        {'bid': [{'price': 0.15, 'adm': '<div>test content 3</div>', 'auid': 903535, 'h': 90, 'w': 728, 'cur': 'EUR'}], 'seat': '1'},
+        {'bid': [{'price': 0.15, 'adm': '<div>test content 4</div>', 'auid': 903535, 'h': 600, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+        {'bid': [{'price': 0.5, 'adm': '<div>test content 5</div>', 'auid': 903536, 'h': 600, 'w': 350, 'cur': 'EUR'}], 'seat': '1'},
       ];
       const bidRequests = [
         {
@@ -550,8 +552,8 @@ describe('VisxAdapter', function () {
 
     it('dublicate uids and sizes in one slot', function () {
       const fullResponse = [
-        {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300}], 'seat': '1'},
-        {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903535, 'h': 250, 'w': 300}], 'seat': '1'},
+        {'bid': [{'price': 1.15, 'adm': '<div>test content 1</div>', 'auid': 903535, 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
+        {'bid': [{'price': 0.5, 'adm': '<div>test content 2</div>', 'auid': 903535, 'h': 250, 'w': 300, 'cur': 'EUR'}], 'seat': '1'},
       ];
       const bidRequests = [
         {