diff --git a/src/anonymousUserTracking/complexCriteria.test.ts b/src/anonymousUserTracking/complexCriteria.test.ts
index c7284341..df29440c 100644
--- a/src/anonymousUserTracking/complexCriteria.test.ts
+++ b/src/anonymousUserTracking/complexCriteria.test.ts
@@ -694,7 +694,9 @@ describe('complexCriteria', () => {
           {
             eventName: 'button-clicked',
             dataFields: {
-              'button-clicked.lastPageViewed': 'welcome page'
+              'button-clicked': {
+                lastPageViewed: 'welcome page'
+              }
             },
             eventType: 'customEvent'
           },
diff --git a/src/anonymousUserTracking/criteriaCompletionChecker.ts b/src/anonymousUserTracking/criteriaCompletionChecker.ts
index cbe2bc0a..85c00195 100644
--- a/src/anonymousUserTracking/criteriaCompletionChecker.ts
+++ b/src/anonymousUserTracking/criteriaCompletionChecker.ts
@@ -328,9 +328,21 @@ class CriteriaCompletionChecker {
           return true;
         }
       }
+
+      if (field.includes('.') && query.comparatorType !== 'IsSet') {
+        const valueFromObj = this.getValueFromNestedObject(eventData, field);
+        if (valueFromObj) {
+          return this.evaluateComparison(
+            query.comparatorType,
+            valueFromObj,
+            query.value ? query.value : ''
+          );
+        }
+      }
       const eventKeyItems = filteredLocalDataKeys.filter(
         (keyItem) => keyItem === field
       );
+
       if (eventKeyItems.length) {
         return this.evaluateComparison(
           query.comparatorType,
@@ -343,6 +355,22 @@ class CriteriaCompletionChecker {
     return matchResult;
   }
 
+  private getValueFromNestedObject(eventData: any, field: string): any {
+    const valueFromObj = this.getFieldValue(eventData, field);
+    if (typeof valueFromObj === 'object') {
+      return Object.keys(valueFromObj).map((key) =>
+        this.getValueFromNestedObject(valueFromObj, key)
+      );
+    } else {
+      return valueFromObj;
+    }
+  }
+
+  private getFieldValue(data: any, field: string): any {
+    const fields = field.split('.');
+    return fields.reduce((acc, field) => acc?.[field], data);
+  }
+
   private doesItemMatchQueries(item: any, searchQueries: any[]): boolean {
     let shouldReturn = false;
     const filteredSearchQueries = searchQueries.filter((searchQuery) => {
diff --git a/src/anonymousUserTracking/tests/complexCriteria.test.ts b/src/anonymousUserTracking/tests/complexCriteria.test.ts
index ed7c6876..c58280bc 100644
--- a/src/anonymousUserTracking/tests/complexCriteria.test.ts
+++ b/src/anonymousUserTracking/tests/complexCriteria.test.ts
@@ -694,7 +694,7 @@ describe('complexCriteria', () => {
           {
             eventName: 'button-clicked',
             dataFields: {
-              'button-clicked.lastPageViewed': 'welcome page'
+              'button-clicked': { lastPageViewed: 'welcome page' }
             },
             eventType: 'customEvent'
           },
@@ -1309,8 +1309,10 @@ describe('complexCriteria', () => {
         return JSON.stringify([
           {
             dataFields: {
-              'animal-found.type': 'cat',
-              'animal-found.count': 4
+              'animal-found': {
+                type: 'cat',
+                count: 4
+              }
             },
             eventType: 'customEvent'
           },
diff --git a/src/anonymousUserTracking/tests/criteriaCompletionChecker.test.ts b/src/anonymousUserTracking/tests/criteriaCompletionChecker.test.ts
index 8b564656..21da9c2e 100644
--- a/src/anonymousUserTracking/tests/criteriaCompletionChecker.test.ts
+++ b/src/anonymousUserTracking/tests/criteriaCompletionChecker.test.ts
@@ -38,7 +38,13 @@ describe('CriteriaCompletionChecker', () => {
           {
             eventName: 'testEvent',
             createdAt: 1708494757530,
-            dataFields: { 'browserVisit.website.domain': 'google.com' },
+            dataFields: {
+              browserVisit: {
+                website: {
+                  domain: 'google.com'
+                }
+              }
+            },
             createNewFields: true,
             eventType: 'customEvent'
           }
@@ -109,7 +115,7 @@ describe('CriteriaCompletionChecker', () => {
           {
             eventName: 'testEvent',
             createdAt: 1708494757530,
-            dataFields: { 'browserVisit.website.domain': 'google.com' },
+            dataFields: { browserVisit: { website: { domain: 'google.com' } } },
             createNewFields: true,
             eventType: 'customEvent'
           }
@@ -1008,7 +1014,7 @@ describe('CriteriaCompletionChecker', () => {
           {
             eventName: 'button-clicked',
             dataFields: {
-              'button-clicked.animal': 'test page',
+              'button-clicked': { animal: 'test page' },
               total: 3
             },
             createdAt: 1700071052507,