diff --git a/app/Helpers/Csv/PostProcessing/OpposingAccount.php b/app/Helpers/Csv/PostProcessing/OpposingAccount.php
index f7690438be..146e15d931 100644
--- a/app/Helpers/Csv/PostProcessing/OpposingAccount.php
+++ b/app/Helpers/Csv/PostProcessing/OpposingAccount.php
@@ -24,6 +24,10 @@ class OpposingAccount implements PostProcessorInterface
      */
     public function process()
     {
+        // three values:
+        // opposing-account-id, opposing-account-iban, opposing-account-name
+
+
         $result = $this->checkIdNameObject();
         if (!is_null($result)) {
             return $result;
@@ -56,11 +60,13 @@ class OpposingAccount implements PostProcessorInterface
     protected function checkIdNameObject()
     {
         if ($this->data['opposing-account-id'] instanceof Account) { // first priority. try to find the account based on ID, if any
+            Log::debug('OpposingAccountPostProcession: opposing-account-id is an Account.');
             $this->data['opposing-account-object'] = $this->data['opposing-account-id'];
 
             return $this->data;
         }
         if ($this->data['opposing-account-iban'] instanceof Account) { // second: try to find the account based on IBAN, if any.
+            Log::debug('OpposingAccountPostProcession: opposing-account-iban is an Account.');
             $this->data['opposing-account-object'] = $this->data['opposing-account-iban'];
 
             return $this->data;
@@ -75,9 +81,12 @@ class OpposingAccount implements PostProcessorInterface
     protected function checkIbanString()
     {
         $rules     = ['iban' => 'iban'];
-        $check     = ['iban' => $this->data['opposing-account-iban']];
+        $iban      = $this->data['opposing-account-iban'];
+        $check     = ['iban' => $iban];
         $validator = Validator::make($check, $rules);
-        if (!$validator->fails()) {
+        if (is_string($iban) && strlen($iban) > 0 && !$validator->fails()) {
+
+            Log::debug('OpposingAccountPostProcession: opposing-account-iban is a string (' . $this->data['opposing-account-iban'] . ').');
             $this->data['opposing-account-object'] = $this->parseIbanString();
 
             return $this->data;
@@ -95,12 +104,14 @@ class OpposingAccount implements PostProcessorInterface
         $accounts = Auth::user()->accounts()->get();
         foreach ($accounts as $entry) {
             if ($entry->iban == $this->data['opposing-account-iban']) {
+                Log::debug('OpposingAccountPostProcession: opposing-account-iban matches an Account.');
 
                 return $entry;
             }
         }
         $account = $this->createAccount();
 
+
         return $account;
     }
 
@@ -123,6 +134,7 @@ class OpposingAccount implements PostProcessorInterface
                 'active'          => true,
             ]
         );
+        Log::debug('OpposingAccountPostProcession: created a new account.');
 
         return $account;
     }
@@ -153,11 +165,13 @@ class OpposingAccount implements PostProcessorInterface
     protected function checkNameString()
     {
         if ($this->data['opposing-account-name'] instanceof Account) { // third: try to find account based on name, if any.
+            Log::debug('OpposingAccountPostProcession: opposing-account-name is an Account.');
             $this->data['opposing-account-object'] = $this->data['opposing-account-name'];
 
             return $this->data;
         }
         if (is_string($this->data['opposing-account-name'])) {
+
             $this->data['opposing-account-object'] = $this->parseNameString();
 
             return $this->data;
diff --git a/app/Validation/FireflyValidator.php b/app/Validation/FireflyValidator.php
index faa07a5e49..c878a6fd82 100644
--- a/app/Validation/FireflyValidator.php
+++ b/app/Validation/FireflyValidator.php
@@ -65,6 +65,9 @@ class FireflyValidator extends Validator
         if (!is_string($value)) {
             return false;
         }
+        if (is_null($value)) {
+            return false;
+        }
 
         if (strlen($value) === 0) {
             return false;