diff --git a/DotNet/DataAcquisition/Application/Models/Kafka/ResourceAcquired.cs b/DotNet/DataAcquisition/Application/Models/Kafka/ResourceAcquired.cs
index a1088a589..76adecf2e 100644
--- a/DotNet/DataAcquisition/Application/Models/Kafka/ResourceAcquired.cs
+++ b/DotNet/DataAcquisition/Application/Models/Kafka/ResourceAcquired.cs
@@ -4,6 +4,7 @@ namespace LantanaGroup.Link.DataAcquisition.Application.Models.Kafka;
 
 public class ResourceAcquired
 {
+    public bool AcquisitionComplete { get; set; } = false;
     public string PatientId { get; set; }
     public string QueryType { get; set; }
     public Resource Resource { get; set; }
diff --git a/DotNet/DataAcquisition/Application/Services/PatientDataService.cs b/DotNet/DataAcquisition/Application/Services/PatientDataService.cs
index ddfee60b7..bcbdd13e8 100644
--- a/DotNet/DataAcquisition/Application/Services/PatientDataService.cs
+++ b/DotNet/DataAcquisition/Application/Services/PatientDataService.cs
@@ -199,6 +199,9 @@ await _queryListProcessor.Process(
                 }
                 catch (Exception ex)
                 {
+                    //produce tailing message
+                    await ProduceTailingMessage(request.FacilityId, request.CorrelationId, patientId, dataAcqRequested.QueryType, dataAcqRequested.ScheduledReports, cancellationToken);
+
                     var message =
                         $"Error retrieving data from EHR for facility: {request.FacilityId}\n{ex.Message}\n{ex.InnerException}";
                     _logger.LogError(message);
@@ -206,6 +209,30 @@ await _queryListProcessor.Process(
                 }
             }
         }
+
+        //produce tailing message to indicate acquisition is complete
+        await ProduceTailingMessage(request.FacilityId, request.CorrelationId, patientId, dataAcqRequested.QueryType, dataAcqRequested.ScheduledReports, cancellationToken);
+    }
+
+    private async Task ProduceTailingMessage(string facilityId, string correlationId, string patientId, string queryType, List<ScheduledReport> scheduledReports, CancellationToken cancellationToken)
+    {
+        await _kafkaProducer.ProduceAsync(
+            KafkaTopic.ResourceAcquired.ToString(),
+            new Message<string, ResourceAcquired>
+            {
+                Key = facilityId,
+                Headers = new Headers
+                {
+                        new Header(DataAcquisitionConstants.HeaderNames.CorrelationId, Encoding.UTF8.GetBytes(correlationId))
+                },
+                Value = new ResourceAcquired
+                {
+                    AcquisitionComplete = true,
+                    PatientId = patientId,
+                    QueryType = queryType,
+                    ScheduledReports = scheduledReports
+                }
+            }, cancellationToken);
     }
 
     private static string TEMPORARYPatientIdPart(string fullPatientUrl)
diff --git a/DotNet/Normalization/Application/Models/Messages/ResourceAcquiredMessage.cs b/DotNet/Normalization/Application/Models/Messages/ResourceAcquiredMessage.cs
index f642fc0da..a616a664b 100644
--- a/DotNet/Normalization/Application/Models/Messages/ResourceAcquiredMessage.cs
+++ b/DotNet/Normalization/Application/Models/Messages/ResourceAcquiredMessage.cs
@@ -4,6 +4,7 @@ namespace LantanaGroup.Link.Normalization.Application.Models.Messages;
 
 public class ResourceAcquiredMessage
 {
+    public bool AcquisitionComplete { get; set; } = false;
     public string PatientId { get; set; }
     public string QueryType { get; set; }
     public object Resource { get; set; }
diff --git a/DotNet/Normalization/Application/Models/Messages/ResourceNormalizedMessage.cs b/DotNet/Normalization/Application/Models/Messages/ResourceNormalizedMessage.cs
index 6dfbc1f09..9a9e7f6cc 100644
--- a/DotNet/Normalization/Application/Models/Messages/ResourceNormalizedMessage.cs
+++ b/DotNet/Normalization/Application/Models/Messages/ResourceNormalizedMessage.cs
@@ -5,6 +5,7 @@ namespace LantanaGroup.Link.Normalization.Application.Models.Messages;
 
 public class ResourceNormalizedMessage
 {
+    public bool AcquisitionComplete { get; set; } = false;
     public string PatientId { get; set; }
     public string QueryType { get; set; }
     public object Resource { get; set; }
diff --git a/DotNet/Normalization/Listeners/ResourceAcquiredListener.cs b/DotNet/Normalization/Listeners/ResourceAcquiredListener.cs
index 263a61d74..33c8b8fd0 100644
--- a/DotNet/Normalization/Listeners/ResourceAcquiredListener.cs
+++ b/DotNet/Normalization/Listeners/ResourceAcquiredListener.cs
@@ -104,7 +104,13 @@ await kafkaConsumer.ConsumeWithInstrumentation(async (result, CancellationToken)
                             throw new DeadLetterException("Message Key (FacilityId) is null or empty.");
                         }
 
-                        if (message.Value == null || message.Value.Resource == null || string.IsNullOrWhiteSpace(message.Value.QueryType) || message.Value.ScheduledReports == null)
+                        if (
+                        message.Message.Value == null 
+                            || ((message.Message.Value.Resource == null 
+                                || string.IsNullOrWhiteSpace(message.Message.Value.QueryType) 
+                                || message.Message.Value.ScheduledReports == null)
+                               && !message.Message.Value.AcquisitionComplete)
+                        )
                         {
                             throw new DeadLetterException("Bad message with one of the followign reasons: \n* Null Message \n* Null Resource \n* No QueryType \n* No Scheduled Reports. Skipping message.");
                         }
@@ -119,6 +125,30 @@ await kafkaConsumer.ConsumeWithInstrumentation(async (result, CancellationToken)
                             throw new DeadLetterException("Failed to extract FacilityId and CorrelationId from message.", ex);
                         }
 
+                        if (message.Message.Value.AcquisitionComplete && message.Message.Value.Resource == null)
+                        {
+                            _logger.LogInformation("Acquisition Complete tail message received. Producing message for measure eval.");
+                            var headers = new Headers
+                            {
+                                new Header(NormalizationConstants.HeaderNames.CorrelationId, Encoding.UTF8.GetBytes(messageMetaData.correlationId))
+                            };
+                            var resourceNormalizedMessage = new ResourceNormalizedMessage
+                            {
+                                AcquisitionComplete = message.Message.Value.AcquisitionComplete,
+                                PatientId = message.Message.Value.PatientId ?? "",
+                                QueryType = message.Message.Value.QueryType,
+                                ScheduledReports = message.Message.Value.ScheduledReports
+                            };
+                            Message<string, ResourceNormalizedMessage> produceMessage = new Message<string, ResourceNormalizedMessage>
+                            {
+                                Key = messageMetaData.facilityId,
+                                Headers = headers,
+                                Value = resourceNormalizedMessage
+                            };
+                            await kafkaProducer.ProduceAsync(KafkaTopic.ResourceNormalized.ToString(), produceMessage);
+                            return;
+                        }
+
                         NormalizationConfig? config = null;
                         try
                         {
@@ -277,10 +307,10 @@ await _auditService.TriggerAuditEvent(new TriggerAuditEventCommand
                             };
                             var resourceNormalizedMessage = new ResourceNormalizedMessage
                             {
-                                PatientId = message.Value.PatientId ?? "",
+                                AcquisitionComplete = message.Message.Value.AcquisitionComplete,
+                                PatientId = message.Message.Value.PatientId ?? "",
                                 Resource = serializedResource,
-
-                                QueryType = message.Value.QueryType,
+                                QueryType = message.Message.Value.QueryType,
                                 ScheduledReports = message.Message.Value.ScheduledReports
                             };
                             Message<string, ResourceNormalizedMessage> produceMessage = new Message<string, ResourceNormalizedMessage>