diff --git a/application/Contract/ContractController.php b/application/Contract/ContractController.php
index 6626b9c6c..d8d409e08 100644
--- a/application/Contract/ContractController.php
+++ b/application/Contract/ContractController.php
@@ -805,6 +805,19 @@ class ContractController extends mfBaseController
             $finish_date->setTimezone(new DateTimeZone("Europe/Vienna"));
             $finish_date->setTime(0, 0, 0);
             $contract_data['finish_date'] = $finish_date->getTimestamp();
+            if($mode == "add") {
+                $contract_data['finish_date_by'] = $this->me->id;
+            } else {
+                if($contract->finish_date) {
+                    $contract_finish_date = new DateTime("@".$contract->finish_date);
+                    $contract_finish_date->setTimezone(new DateTimeZone("Europe/Vienna"));
+                    if($contract_finish_date->format("Y-m-d") != $finish_date->format("Y-m-d")) {
+                        $contract_data['finish_date_by'] = $this->me->id;
+                    }
+                } else {
+                    $contract_data['finish_date_by'] = $this->me->id;
+                }
+            }
         }  else {
             $contract_data['finish_date'] = null;
         }
@@ -814,6 +827,19 @@ class ContractController extends mfBaseController
             $cancel_date->setTimezone(new DateTimeZone("Europe/Vienna"));
             $cancel_date->setTime(0, 0, 0);
             $contract_data['cancel_date'] = $cancel_date->getTimestamp();
+            if($mode == "add") {
+                $contract_data['cancel_date_by'] = $this->me->id;
+            } else {
+                if($contract->cancel_date) {
+                    $contract_cancel_date = new DateTime("@".$contract->cancel_date);
+                    $contract_cancel_date->setTimezone(new DateTimeZone("Europe/Vienna"));
+                    if($contract_cancel_date->format("Y-m-d") != $cancel_date->format("Y-m-d")) {
+                        $contract_data['cancel_date_by'] = $this->me->id;
+                    }
+                } else {
+                    $contract_data['cancel_date_by'] = $this->me->id;
+                }
+            }
         } else {
             $contract_data['cancel_date'] = null;
         }