diff --git a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/index.test.ts b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/index.test.ts
index 474d09c902..f1d1c36c32 100644
--- a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/index.test.ts
+++ b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/index.test.ts
@@ -16,7 +16,7 @@ describe('Send Events Action', () => {
     s3_secret: 'secret',
     s3_region: 'us-east-1',
     s3_bucket_accesspoint_alias: 'my-bucket',
-    fileNamePrefix: 'prefix'
+    fileNamePrefix: 'prefix_'
   } as Settings
 
   test('perform ValidateSettings call with valid payload and settings', async () => {
diff --git a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/preCheck.test.ts b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/preCheck.test.ts
index e81760ac04..e604e5cf56 100644
--- a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/preCheck.test.ts
+++ b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/__tests__/preCheck.test.ts
@@ -9,7 +9,7 @@ const validS3Settings = {
   s3_secret: 'secret',
   s3_region: 'us-east-1',
   s3_bucket_accesspoint_alias: 'my-bucket',
-  fileNamePrefix: 'prefix'
+  fileNamePrefix: 'prefix_'
 }
 
 describe('validateSettings', () => {
diff --git a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/eventprocessing.ts b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/eventprocessing.ts
index 05a391c8ab..74fff53439 100644
--- a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/eventprocessing.ts
+++ b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/eventprocessing.ts
@@ -6,12 +6,7 @@ import get from 'lodash/get'
 export function parseSections(section: { [key: string]: string }, nestDepth: number) {
   const parseResults: { [key: string]: string } = {}
 
-  if (nestDepth > 10)
-    throw new IntegrationError(
-      'Event data exceeds nesting depth. Use Mapping to flatten the data to no more than 3 levels deep',
-      'NESTING_DEPTH_EXCEEDED',
-      400
-    )
+  if (nestDepth > 10) throw new IntegrationError('Event data exceeds nesting depth.', 'NESTING_DEPTH_EXCEEDED', 400)
 
   try {
     if (section === null) section = { null: '' }
@@ -31,11 +26,19 @@ export function parseSections(section: { [key: string]: string }, nestDepth: num
       }
     }
   } catch (e) {
-    throw new IntegrationError(
-      `Unexpected Exception while parsing Event payload.\n ${e}`,
-      'UNEXPECTED_EVENT_PARSING_EXCEPTION',
-      400
-    )
+    const ie = e as IntegrationError
+    if (ie.code === 'NESTING_DEPTH_EXCEEDED')
+      throw new IntegrationError(
+        'Event data exceeds nesting depth. Use Mapping to flatten data structures to no more than 3 levels deep',
+        'NESTING_DEPTH_EXCEEDED',
+        400
+      )
+    else
+      throw new IntegrationError(
+        `Unexpected Exception while parsing Event payload.\n ${e}`,
+        'UNEXPECTED_EVENT_PARSING_EXCEPTION',
+        400
+      )
   }
   return parseResults
 }
diff --git a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/preCheck.ts b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/preCheck.ts
index 0f38e40e38..9248a1cce6 100644
--- a/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/preCheck.ts
+++ b/packages/destination-actions/src/destinations/acoustic-s3tc/receiveEvents/preCheck.ts
@@ -19,7 +19,25 @@ function validateSettings(settings: Settings) {
   }
 
   if (!settings.fileNamePrefix) {
-    throw new IntegrationError('Missing Customer Prefix', 'MISSING_CUSTOMER_PREFIX', 400)
+    throw new IntegrationError(
+      'Missing Customer Prefix. Customer Prefix should be of the form of 4-5 characters followed by an underscore character',
+      'MISSING_CUSTOMER_PREFIX',
+      400
+    )
+  }
+  if (!settings.fileNamePrefix.endsWith('_')) {
+    throw new IntegrationError(
+      'Invalid Customer Prefix. Customer Prefix must end with an underscore character "_".  ',
+      'INVALID_CUSTOMER_PREFIX',
+      400
+    )
+  }
+  if (settings.fileNamePrefix === 'customer_org_') {
+    throw new IntegrationError(
+      'Unedited Customer Prefix. Customer Prefix remains as the default value, must edit and provide a valid Customer prefix (4-5 characters) followed by an underscore',
+      'INVALID_CUSTOMER_PREFIX',
+      400
+    )
   }
 }