diff --git a/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/CheckoutAmountTransactionApplier.java b/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/CheckoutAmountTransactionApplier.java
index b7c458c6bd..03e8fa6c35 100644
--- a/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/CheckoutAmountTransactionApplier.java
+++ b/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/CheckoutAmountTransactionApplier.java
@@ -87,7 +87,11 @@ public void apply(
 		if (transaction.isAll()) {
 			amount = stored.getAmount();
 		}
-		
+
+		if (amount.getValue().equals(0)) {
+			throw new IllegalArgumentException("Amount to checkout must be greater than zero.");
+		}
+
 		ItemCheckout.ItemCheckoutBuilder<?, ?, ?> checkoutBuilder = ItemAmountCheckout.builder()
 															.checkedOutByEntity(interactingEntity.getId())
 															.item(inventoryItem.getId())
diff --git a/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/SubtractAmountTransactionApplier.java b/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/SubtractAmountTransactionApplier.java
index fe0bef6b9e..2aceda62fc 100644
--- a/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/SubtractAmountTransactionApplier.java
+++ b/software/core/oqm-core-api/src/main/java/tech/ebp/oqm/core/api/service/mongo/transactions/appliers/SubtractAmountTransactionApplier.java
@@ -89,7 +89,11 @@ public void apply(
 		if(toSubtract == null){
 			throw new IllegalStateException("Cannot subtract an amount from a null value. Should not get here.");
 		}
-		
+
+		if (toSubtract.getValue().equals(0)) {
+			throw new IllegalArgumentException("Amount to subtract must be greater than zero.");
+		}
+
 		stored.subtract(toSubtract);
 
 		affectedStored.add(stored);