diff --git a/modules/nativoBidAdapter.js b/modules/nativoBidAdapter.js
index f91a8b6085b..8259c179675 100644
--- a/modules/nativoBidAdapter.js
+++ b/modules/nativoBidAdapter.js
@@ -1,19 +1,19 @@
-import { isEmpty } from '../src/utils.js';
-import { registerBidder } from '../src/adapters/bidderFactory.js';
-import { BANNER } from '../src/mediaTypes.js';
+import { deepAccess, isEmpty } from '../src/utils.js'
+import { registerBidder } from '../src/adapters/bidderFactory.js'
+import { BANNER } from '../src/mediaTypes.js'
 // import { config } from 'src/config'
 
-const BIDDER_CODE = 'nativo';
-const BIDDER_ENDPOINT = 'https://exchange.postrelease.com/prebid';
+const BIDDER_CODE = 'nativo'
+const BIDDER_ENDPOINT = 'https://exchange.postrelease.com/prebid'
 
-const GVLID = 263;
+const GVLID = 263
 
-const TIME_TO_LIVE = 360;
+const TIME_TO_LIVE = 360
 
-const SUPPORTED_AD_TYPES = [BANNER];
+const SUPPORTED_AD_TYPES = [BANNER]
 
-const bidRequestMap = {};
-const adUnitsRequested = {};
+const bidRequestMap = {}
+const adUnitsRequested = {}
 
 // Prebid adapter referrence doc: https://docs.prebid.org/dev-docs/bidder-adaptor.html
 
@@ -30,7 +30,7 @@ export const spec = {
    * @return boolean True if this is a valid bid, and false otherwise.
    */
   isBidRequestValid: function (bid) {
-    return bid.params && !!bid.params.placementId
+    return true
   },
 
   /**
@@ -42,27 +42,37 @@ export const spec = {
    * @return ServerRequest Info describing the request to the server.
    */
   buildRequests: function (validBidRequests, bidderRequest) {
-    const placementIds = []
+    const placementIds = new Set()
     const placmentBidIdMap = {}
     let placementId, pageUrl
     validBidRequests.forEach((request) => {
-      pageUrl = pageUrl || request.params.url // Use the first url value found
-      placementId = request.params.placementId
-      placementIds.push(placementId)
-      placmentBidIdMap[placementId] = {
+      pageUrl = deepAccess(
+        request,
+        'params.url',
+        bidderRequest.refererInfo.referer
+      )
+      placementId = deepAccess(request, 'params.placementId')
+
+      if (placementId) {
+        placementIds.add(placementId)
+      }
+
+      var key = placementId || request.adUnitCode
+      placmentBidIdMap[key] = {
         bidId: request.bidId,
         size: getLargestSize(request.sizes),
       }
     })
     bidRequestMap[bidderRequest.bidderRequestId] = placmentBidIdMap
 
-    if (!pageUrl) pageUrl = bidderRequest.refererInfo.referer
-
     // Build adUnit data
     const adUnitData = {
       adUnits: validBidRequests.map((adUnit) => {
         // Track if we've already requested for this ad unit code
-        adUnitsRequested[adUnit.adUnitCode] = adUnitsRequested[adUnit.adUnitCode] !== undefined ? adUnitsRequested[adUnit.adUnitCode]++ : 0
+        adUnitsRequested[adUnit.adUnitCode] =
+          adUnitsRequested[adUnit.adUnitCode] !== undefined
+            ? adUnitsRequested[adUnit.adUnitCode]++
+            : 0
         return {
           adUnitCode: adUnit.adUnitCode,
           mediaTypes: adUnit.mediaTypes,
@@ -72,7 +82,6 @@ export const spec = {
 
     // Build QS Params
     let params = [
-      { key: 'ntv_ptd', value: placementIds.toString() },
       { key: 'ntv_pb_rid', value: bidderRequest.bidderRequestId },
       {
         key: 'ntv_ppc',
@@ -80,14 +89,18 @@ export const spec = {
       },
       {
         key: 'ntv_dbr',
-        value: btoa(JSON.stringify(adUnitsRequested))
+        value: btoa(JSON.stringify(adUnitsRequested)),
       },
       {
         key: 'ntv_url',
         value: encodeURIComponent(pageUrl),
-      }
+      },
     ]
 
+    if (placementIds.size > 0) {
+      params.unshift({ key: 'ntv_ptd', value: [...placementIds].join(',') })
+    }
+
     if (bidderRequest.gdprConsent) {
       // Put on the beginning of the qs param array
       params.unshift({
@@ -135,7 +148,7 @@ export const spec = {
       let bidResponse, adUnit
       seatbids.forEach((seatbid) => {
         seatbid.bid.forEach((bid) => {
-          adUnit = this.getRequestId(body.id, bid.impid)
+          adUnit = this.getAdUnitData(body.id, bid)
           bidResponse = {
             requestId: adUnit.bidId,
             cpm: bid.price,
@@ -268,14 +281,16 @@ export const spec = {
   /**
    * Maps Prebid's bidId to Nativo's placementId values per unique bidderRequestId
    * @param {String} bidderRequestId - The unique ID value associated with the bidderRequest
-   * @param {String} placementId - The placement ID value from Nativo
+   * @param {Object} bid - The placement ID value from Nativo
    * @returns {String} - The bidId value associated with the corresponding placementId
    */
-  getRequestId: function (bidderRequestId, placementId) {
-    return (
-      bidRequestMap[bidderRequestId] &&
-      bidRequestMap[bidderRequestId][placementId]
-    )
+  getAdUnitData: function (bidderRequestId, bid) {
+    var data = deepAccess(bidRequestMap, `${bidderRequestId}.${bid.impid}`)
+
+    if (data) return data
+
+    var unitCode = deepAccess(bid, 'ext.ad_unit_id')
+    return deepAccess(bidRequestMap, `${bidderRequestId}.${unitCode}`)
   },
 }
 registerBidder(spec)
diff --git a/modules/nativoBidAdapter.md b/modules/nativoBidAdapter.md
index ec0980aae50..f83fb45b52e 100644
--- a/modules/nativoBidAdapter.md
+++ b/modules/nativoBidAdapter.md
@@ -29,7 +29,6 @@ var adUnits = [
             bids: [{
                 bidder: 'nativo',
                 params: {
-                    placementId: 1125609,
                     url: 'https://test-sites.internal.nativo.net/testing/prebid_adpater.html'
                 }
             }]
diff --git a/test/spec/modules/nativoBidAdapter_spec.js b/test/spec/modules/nativoBidAdapter_spec.js
index 4202b7c6f91..dfc9f5b99b3 100644
--- a/test/spec/modules/nativoBidAdapter_spec.js
+++ b/test/spec/modules/nativoBidAdapter_spec.js
@@ -26,11 +26,11 @@ describe('nativoBidAdapterTests', function () {
       expect(spec.isBidRequestValid(bid)).to.equal(true)
     })
 
-    it('should return false when required params are not passed', function () {
+    it('should return true when params are not passed', function () {
       let bid2 = Object.assign({}, bid)
       delete bid2.params
       bid2.params = {}
-      expect(spec.isBidRequestValid(bid2)).to.equal(false)
+      expect(spec.isBidRequestValid(bid2)).to.equal(true)
     })
   })
 
@@ -129,7 +129,12 @@ describe('interpretResponse', function () {
     }
 
     // mock
-    spec.getRequestId = () => 123456
+    spec.getAdUnitData = () => {
+      return {
+        bidId: 123456,
+        sizes: [300, 250],
+      }
+    }
 
     let result = spec.interpretResponse({ body: response }, { bidderRequest })
     expect(Object.keys(result[0])).to.have.deep.members(
@@ -232,3 +237,45 @@ describe('getUserSyncs', function () {
     )
   })
 })
+
+describe('getAdUnitData', () => {
+  afterEach(() => {
+    if (window.bidRequestMap) delete window.bidRequestMap
+  })
+
+  it('Matches placementId value', () => {
+    const adUnitData = {
+      bidId: 123456,
+      sizes: [300, 250],
+    }
+
+    window.bidRequestMap = {
+      9876543: {
+        12345: adUnitData,
+      },
+    }
+
+    const data = spec.getAdUnitData(9876543, { impid: 12345 })
+    expect(Object.keys(data)).to.have.deep.members(
+      Object.keys(adUnitData)
+    )
+  })
+
+  it('Falls back to ad unit code value', () => {
+    const adUnitData = {
+      bidId: 123456,
+      sizes: [300, 250],
+    }
+
+    window.bidRequestMap = {
+      9876543: {
+        '#test-code': adUnitData,
+      },
+    }
+
+    const data = spec.getAdUnitData(9876543, { impid: 12345, ext: { ad_unit_code: '#test-code' } })
+    expect(Object.keys(data)).to.have.deep.members(
+      Object.keys(adUnitData)
+    )
+  })
+})