diff --git a/sdk/eventhub/event-hubs/src/eventPosition.ts b/sdk/eventhub/event-hubs/src/eventPosition.ts
index e257a3695609..36a2254cb74f 100644
--- a/sdk/eventhub/event-hubs/src/eventPosition.ts
+++ b/sdk/eventhub/event-hubs/src/eventPosition.ts
@@ -118,9 +118,6 @@ export function validateEventPositions(
     return;
   }
 
-  const offsetPresent = position.offset != undefined;
-  const sequenceNumberPresent = position.sequenceNumber != undefined;
-  const enqueuedOnPresent = position.enqueuedOn != undefined;
   const keys = Object.keys(position);
 
   if (!keys.length) {
@@ -129,7 +126,7 @@ export function validateEventPositions(
     );
   }
 
-  if (offsetPresent || sequenceNumberPresent || enqueuedOnPresent || !keys.length) {
+  if (isEventPosition(position)) {
     validateEventPosition(position);
     return;
   }
@@ -142,6 +139,33 @@ export function validateEventPositions(
   }
 }
 
+/**
+ * Determines whether a position is an EventPosition.
+ * Does not validate that the position is allowed.
+ * @param position
+ * @ignore
+ * @internal
+ */
+export function isEventPosition(position: any): position is EventPosition {
+  if (!position) {
+    return false;
+  }
+
+  if (position.offset != undefined) {
+    return true;
+  }
+
+  if (position.sequenceNumber != undefined) {
+    return true;
+  }
+
+  if (position.enqueuedOn != undefined) {
+    return true;
+  }
+
+  return false;
+}
+
 function validateEventPosition(position: EventPosition) {
   if (position == undefined) {
     return;
diff --git a/sdk/eventhub/event-hubs/src/eventProcessor.ts b/sdk/eventhub/event-hubs/src/eventProcessor.ts
index e4e8a0211365..5b3b073eb520 100644
--- a/sdk/eventhub/event-hubs/src/eventProcessor.ts
+++ b/sdk/eventhub/event-hubs/src/eventProcessor.ts
@@ -9,7 +9,7 @@ import { logger, logErrorStackTrace } from "./log";
 import { FairPartitionLoadBalancer, PartitionLoadBalancer } from "./partitionLoadBalancer";
 import { PartitionProcessor, Checkpoint } from "./partitionProcessor";
 import { SubscriptionEventHandlers } from "./eventHubConsumerClientModels";
-import { EventPosition, latestEventPosition } from "./eventPosition";
+import { EventPosition, latestEventPosition, isEventPosition } from "./eventPosition";
 import { delayWithoutThrow } from "./util/delayWithoutThrow";
 import { CommonEventProcessorOptions } from "./models/private";
 import { CloseReason } from "./models/public";
@@ -587,11 +587,7 @@ function getStartPosition(
     return latestEventPosition;
   }
 
-  if (
-    startPositions.offset != undefined ||
-    startPositions.sequenceNumber != undefined ||
-    startPositions.enqueuedOn != undefined
-  ) {
+  if (isEventPosition(startPositions)) {
     return startPositions;
   }