diff --git a/setup.cfg b/setup.cfg
index 609dbe4..dc1c6dd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,6 +11,7 @@ python_requires = >= 3.10
 install_requires = 
     redis
     rq
+    python-dateutil
 
 [options.packages.find]
 where = src
diff --git a/src/piracyshield_service/account/session/get_current_by_account.py b/src/piracyshield_service/account/session/get_current_by_account.py
index d3b701f..e3811b7 100644
--- a/src/piracyshield_service/account/session/get_current_by_account.py
+++ b/src/piracyshield_service/account/session/get_current_by_account.py
@@ -53,7 +53,7 @@ class AccountSessionGetCurrentByAccountService(BaseService):
 
                 # TODO: need to deal with this in the storage.
                 # let's save the long session as well
-                long_session = self.data_memory.get_session(f'session:{account_id}:long:{session.get('refresh_token')}')
+                long_session = self.data_memory.get_session(f"session:{account_id}:long:{session.get('refresh_token')}")
 
                 long_session['token'] = session.get('refresh_token')
 
diff --git a/src/piracyshield_service/ticket/create.py b/src/piracyshield_service/ticket/create.py
index a5fab92..f206281 100644
--- a/src/piracyshield_service/ticket/create.py
+++ b/src/piracyshield_service/ticket/create.py
@@ -129,6 +129,7 @@ class TicketCreateService(BaseService):
         )
 
         # proceed to build the relation item <-> provider
+        # this part provides a check for duplicates, whitelisted items and error tickets
         (fqdn_ticket_items, ipv4_ticket_items, ipv6_ticket_items) = self.ticket_relation_establish_service.execute(
             ticket_id = model.get('ticket_id'),
             providers = model.get('assigned_to'),
@@ -150,7 +151,8 @@ class TicketCreateService(BaseService):
             ipv6 = ipv6,
             now = Time.now_iso8601(),
             created_by = created_by,
-            tasks = [   # append the task id so we can cancel its execution if needed
+            tasks = [
+                # append the task id so we can cancel its execution if needed
                 initialize_job_id,
                 autoclose_job_id
             ]
diff --git a/src/piracyshield_service/ticket/item/errors.py b/src/piracyshield_service/ticket/item/errors.py
index 660516d..bf6ac45 100644
--- a/src/piracyshield_service/ticket/item/errors.py
+++ b/src/piracyshield_service/ticket/item/errors.py
@@ -23,6 +23,8 @@ class TicketItemErrorCode:
 
     TICKET_ITEM_UPDATE_TIME_EXCEEDED = '5010'
 
+    TICKET_ITEM_EMPTY_CHECKSUM = '5011'
+
 class TicketItemErrorMessage:
 
     GENERIC = 'Error during the creation of the ticket item.'
@@ -46,3 +48,5 @@ class TicketItemErrorMessage:
     TICKET_ITEM_REASON_NON_VALID = 'Non valid unprocessed reason.'
 
     TICKET_ITEM_UPDATE_TIME_EXCEEDED = 'Cannot update the ticket item: max update time has been exceeded.'
+
+    TICKET_ITEM_EMPTY_CHECKSUM = 'No ticket item available to generate a checksum.'
diff --git a/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum.py b/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum.py
index 707c8e2..39ef0de 100644
--- a/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum.py
+++ b/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum.py
@@ -39,6 +39,10 @@ class TicketItemFQDNGetAllByTicketChecksumService(BaseService):
             ticket_id = ticket_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum_for_provider.py b/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum_for_provider.py
index 651d5a8..327b391 100644
--- a/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum_for_provider.py
+++ b/src/piracyshield_service/ticket/item/fqdn/get_all_by_ticket_checksum_for_provider.py
@@ -40,6 +40,10 @@ class TicketItemFQDNGetAllByTicketChecksumForProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/fqdn/get_all_checksum.py b/src/piracyshield_service/ticket/item/fqdn/get_all_checksum.py
index f128662..5b9eaba 100644
--- a/src/piracyshield_service/ticket/item/fqdn/get_all_checksum.py
+++ b/src/piracyshield_service/ticket/item/fqdn/get_all_checksum.py
@@ -28,7 +28,7 @@ class TicketItemFQDNGetAllChecksumService(BaseService):
 
         self._prepare_modules()
 
-    def execute(self, ticket_id: str) -> dict | Exception:
+    def execute(self) -> dict | Exception:
         """
         Get the checksum of all the FQDN items in the database.
 
@@ -37,6 +37,10 @@ class TicketItemFQDNGetAllChecksumService(BaseService):
 
         response = self.ticket_item_fqdn_get_all_service.execute()
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/fqdn/get_all_checksum_by_provider.py b/src/piracyshield_service/ticket/item/fqdn/get_all_checksum_by_provider.py
index ba20ab9..de71690 100644
--- a/src/piracyshield_service/ticket/item/fqdn/get_all_checksum_by_provider.py
+++ b/src/piracyshield_service/ticket/item/fqdn/get_all_checksum_by_provider.py
@@ -39,6 +39,10 @@ class TicketItemFQDNGetAllChecksumByProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum.py b/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum.py
index bf88347..84a3e97 100644
--- a/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum.py
+++ b/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum.py
@@ -39,6 +39,10 @@ class TicketItemIPv4GetAllByTicketChecksumService(BaseService):
             ticket_id = ticket_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum_for_provider.py b/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum_for_provider.py
index e877705..718393c 100644
--- a/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum_for_provider.py
+++ b/src/piracyshield_service/ticket/item/ipv4/get_all_by_ticket_checksum_for_provider.py
@@ -40,6 +40,10 @@ class TicketItemIPv4GetAllByTicketChecksumForProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv4/get_all_checksum.py b/src/piracyshield_service/ticket/item/ipv4/get_all_checksum.py
index 7a73a2d..d1c0fe1 100644
--- a/src/piracyshield_service/ticket/item/ipv4/get_all_checksum.py
+++ b/src/piracyshield_service/ticket/item/ipv4/get_all_checksum.py
@@ -28,7 +28,7 @@ class TicketItemIPv4GetAllChecksumService(BaseService):
 
         self._prepare_modules()
 
-    def execute(self, ticket_id: str) -> dict | Exception:
+    def execute(self) -> dict | Exception:
         """
         Get the checksum of all the IPv4 items in the database.
 
@@ -37,6 +37,10 @@ class TicketItemIPv4GetAllChecksumService(BaseService):
 
         response = self.ticket_item_ipv4_get_all_service.execute()
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv4/get_all_checksum_by_provider.py b/src/piracyshield_service/ticket/item/ipv4/get_all_checksum_by_provider.py
index afb50b7..504109c 100644
--- a/src/piracyshield_service/ticket/item/ipv4/get_all_checksum_by_provider.py
+++ b/src/piracyshield_service/ticket/item/ipv4/get_all_checksum_by_provider.py
@@ -39,6 +39,10 @@ class TicketItemIPv4GetAllChecksumByProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum.py b/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum.py
index 0f3ae35..d418ab6 100644
--- a/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum.py
+++ b/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum.py
@@ -37,6 +37,10 @@ class TicketItemIPv6GetAllByTicketChecksumService(BaseService):
 
         response = self.get_ipv6_all_by_ticket(ticket_id)
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum_for_provider.py b/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum_for_provider.py
index eab7e61..3d93c51 100644
--- a/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum_for_provider.py
+++ b/src/piracyshield_service/ticket/item/ipv6/get_all_by_ticket_checksum_for_provider.py
@@ -40,6 +40,10 @@ class TicketItemIPv6GetAllByTicketChecksumForProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv6/get_all_checksum.py b/src/piracyshield_service/ticket/item/ipv6/get_all_checksum.py
index e949cf6..2cdb689 100644
--- a/src/piracyshield_service/ticket/item/ipv6/get_all_checksum.py
+++ b/src/piracyshield_service/ticket/item/ipv6/get_all_checksum.py
@@ -28,7 +28,7 @@ class TicketItemIPv6GetAllChecksumService(BaseService):
 
         self._prepare_modules()
 
-    def execute(self, ticket_id: str) -> dict | Exception:
+    def execute(self) -> dict | Exception:
         """
         Get the checksum of all the IPv6 items in the database.
 
@@ -37,6 +37,10 @@ class TicketItemIPv6GetAllChecksumService(BaseService):
 
         response = self.ticket_item_ipv6_get_all_service.execute()
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try:
diff --git a/src/piracyshield_service/ticket/item/ipv6/get_all_checksum_by_provider.py b/src/piracyshield_service/ticket/item/ipv6/get_all_checksum_by_provider.py
index 46e2171..b84ca7c 100644
--- a/src/piracyshield_service/ticket/item/ipv6/get_all_checksum_by_provider.py
+++ b/src/piracyshield_service/ticket/item/ipv6/get_all_checksum_by_provider.py
@@ -39,6 +39,10 @@ class TicketItemIPv6GetAllChecksumByProviderService(BaseService):
             account_id = account_id
         )
 
+        # we don't have any data to work on
+        if not len(response):
+            raise ApplicationException(TicketItemErrorCode.TICKET_ITEM_EMPTY_CHECKSUM, TicketItemErrorMessage.TICKET_ITEM_EMPTY_CHECKSUM)
+
         data = '\n'.join(response)
 
         try: