diff --git a/app/code/Magento/Sales/Model/Order.php b/app/code/Magento/Sales/Model/Order.php
index d20493060c3fd..3ca41ea37b73b 100644
--- a/app/code/Magento/Sales/Model/Order.php
+++ b/app/code/Magento/Sales/Model/Order.php
@@ -665,8 +665,8 @@ private function canCreditmemoForZeroTotalRefunded(float $totalRefunded): bool
         $isRefundZero = abs($totalRefunded) < .0001;
         // Case when Adjustment Fee (adjustment_negative) has been used for first creditmemo
         $hasAdjustmentFee = abs($totalRefunded - $this->getAdjustmentNegative()) < .0001;
-        $hasActinFlag = $this->getActionFlag(self::ACTION_FLAG_EDIT) === false;
-        if ($isRefundZero || $hasAdjustmentFee || $hasActinFlag) {
+        $hasActionFlag = $this->getActionFlag(self::ACTION_FLAG_EDIT) === false;
+        if ($isRefundZero || $hasAdjustmentFee || $hasActionFlag) {
             return false;
         }
 
@@ -682,15 +682,15 @@ private function canCreditmemoForZeroTotalRefunded(float $totalRefunded): bool
     private function canCreditmemoForZeroTotal(float $totalRefunded): bool
     {
         $totalPaid = $this->getTotalPaid();
-        //check if total paid is less than grandtotal
+        //check if total paid is less than grand total
         $checkAmtTotalPaid = $totalPaid <= $this->getGrandTotal();
         //case when amount is due for invoice
-        $dueAmountCondition = $this->canInvoice() && $checkAmtTotalPaid;
+        $hasDueAmount = $this->canInvoice() && $checkAmtTotalPaid;
         //case when paid amount is refunded and order has creditmemo created
         $creditmemos = ($this->getCreditmemosCollection() === false) ?
             true : (count($this->getCreditmemosCollection()) > 0);
         $paidAmtIsRefunded = $this->getTotalRefunded() == $totalPaid && $creditmemos;
-        if (($dueAmountCondition || $paidAmtIsRefunded)
+        if (($hasDueAmount || $paidAmtIsRefunded)
             || (!$checkAmtTotalPaid && abs($totalRefunded - $this->getAdjustmentNegative()) < .0001)
         ) {
             return false;
diff --git a/app/code/Magento/Sales/i18n/en_US.csv b/app/code/Magento/Sales/i18n/en_US.csv
index cc18de430edc1..62d8e53e62fa0 100644
--- a/app/code/Magento/Sales/i18n/en_US.csv
+++ b/app/code/Magento/Sales/i18n/en_US.csv
@@ -796,3 +796,5 @@ Created,Created
 "PDF Creditmemos","PDF Creditmemos"
 Refunds,Refunds
 "Shipment with requested ID %1 doesn't correspond with Order with requested ID %2.","Shipment with requested ID %1 doesn't correspond with Order with requested ID %2."
+"Allow Zero GrandTotal for Creditmemo","Allow Zero GrandTotal for Creditmemo"
+"Allow Zero GrandTotal","Allow Zero GrandTotal"