diff --git a/python/src/functions/generate_presigned_url_and_send_email.py b/python/src/functions/generate_presigned_url_and_send_email.py
index cc78648f..98ea16ca 100644
--- a/python/src/functions/generate_presigned_url_and_send_email.py
+++ b/python/src/functions/generate_presigned_url_and_send_email.py
@@ -10,7 +10,7 @@
 
 from src.lib.email import send_email
 from src.lib.logging import get_logger, reset_contextvars
-from src.lib.s3_helper import get_create_timestamp, get_presigned_url
+from src.lib.s3_helper import get_last_modified_timestamp, get_presigned_url
 from src.lib.treasury_generation_common import OrganizationObj, UserObj
 
 treasury_email_html = """
@@ -119,8 +119,9 @@ def process_event(
         treasuryreports/{organization.id}/{organization.preferences.current_reporting_period_id}/report.zip
     2) If it does not, raise an exception and quit
     3) Generate a pre-signed URL with an expiration date of 1 hour
-    4) Generate an email
-    5) Send email to the user
+    4) Get last modified date timestamp of archive
+    5) Generate an email
+    6) Send email to the user
     """
     s3_client = boto3.client("s3")
     user = payload.user
@@ -135,7 +136,7 @@ def process_event(
     if presigned_url is None:
         raise Exception("Failed to generate signed-URL or file not found")
 
-    timestamp = get_create_timestamp(
+    timestamp = get_last_modified_timestamp(
         s3_client=s3_client,
         bucket=os.environ["REPORTING_DATA_BUCKET_NAME"],
         key=f"treasuryreports/{organization.id}/{organization.preferences.current_reporting_period_id}/report.zip",
diff --git a/python/src/lib/s3_helper.py b/python/src/lib/s3_helper.py
index 6aede773..6a2495f4 100644
--- a/python/src/lib/s3_helper.py
+++ b/python/src/lib/s3_helper.py
@@ -120,7 +120,14 @@ def get_presigned_url(
     return response
 
 
-def get_create_timestamp(s3_client: S3Client, bucket: str, key: str) -> datetime:
+def get_last_modified_timestamp(s3_client: S3Client, bucket: str, key: str) -> datetime:
+    """Gets the last modified timestamp of an S3 object.
+
+    Args:
+        client: Client facilitating head of S3 object
+        bucket: bucket file is in
+        key: S3 key for file
+    """
     logger = get_logger()
     try:
         head = s3_client.head_object(
@@ -129,6 +136,6 @@ def get_create_timestamp(s3_client: S3Client, bucket: str, key: str) -> datetime
         )
         timestamp = head.get("LastModified", datetime.now())
     except Exception:
-        logger.exception(f"Unable to retrieve object for key: {key}")
+        logger.exception(f"Unable to retrieve head for key: {key}")
         return datetime.now()
     return timestamp