diff --git a/app/controllers/audits_controller.rb b/app/controllers/audits_controller.rb
index a807952a5d..c6d8e2c99d 100644
--- a/app/controllers/audits_controller.rb
+++ b/app/controllers/audits_controller.rb
@@ -48,6 +48,8 @@ def finalize
     end
     @audit.finalized!
     redirect_to audit_path(@audit), notice: "Audit is Finalized."
+  rescue => e
+    redirect_back(fallback_location: audits_path, alert: "Could not finalize audit: #{e.message}")
   end
 
   def update
diff --git a/app/controllers/donations_controller.rb b/app/controllers/donations_controller.rb
index 03427f22de..faa739848b 100644
--- a/app/controllers/donations_controller.rb
+++ b/app/controllers/donations_controller.rb
@@ -43,14 +43,15 @@ def index
   def create
     @donation = current_organization.donations.new(donation_params)
 
-    if DonationCreateService.call(@donation)
+    begin
+      DonationCreateService.call(@donation)
       flash[:notice] = "Donation created and logged!"
       redirect_to donations_path
-    else
+    rescue => e
       load_form_collections
       @donation.line_items.build if @donation.line_items.count.zero?
-      flash[:error] = "There was an error starting this donation, try again?"
-      Rails.logger.error "[!] DonationsController#create Error: #{@donation.errors}"
+      flash[:error] = "There was an error starting this donation: #{e.message}"
+      Rails.logger.error "[!] DonationsController#create Error: #{e.message}"
       render action: :new
     end
   end
diff --git a/app/controllers/purchases_controller.rb b/app/controllers/purchases_controller.rb
index a77c34b018..4c1c263d8f 100644
--- a/app/controllers/purchases_controller.rb
+++ b/app/controllers/purchases_controller.rb
@@ -32,14 +32,15 @@ def index
 
   def create
     @purchase = current_organization.purchases.new(purchase_params)
-    if PurchaseCreateService.call(@purchase)
+    begin
+      PurchaseCreateService.call(@purchase)
       flash[:notice] = "New Purchase logged!"
       redirect_to purchases_path
-    else
+    rescue => e
       load_form_collections
       @purchase.line_items.build if @purchase.line_items.count.zero?
-      flash[:error] = "Failed to create purchase due to: #{@purchase.errors.full_messages}"
-      Rails.logger.error "[!] PurchasesController#create ERROR: #{@purchase.errors.full_messages}"
+      flash[:error] = "Failed to create purchase due to: #{e.message}"
+      Rails.logger.error "[!] PurchasesController#create ERROR: #{e.message}"
       render action: :new
     end
   end
diff --git a/app/events/event_types/inventory.rb b/app/events/event_types/inventory.rb
index 948e90e4ec..b20ef33e3e 100644
--- a/app/events/event_types/inventory.rb
+++ b/app/events/event_types/inventory.rb
@@ -30,6 +30,13 @@ def set_item_quantity(item_id:, quantity:, location:)
     # @param to_location [Integer]
     # @param validate [Boolean]
     def move_item(item_id:, quantity:, from_location: nil, to_location: nil, validate: true)
+      if quantity.negative?
+        return move_item(item_id: item_id,
+          quantity: -quantity,
+          from_location: to_location,
+          to_location: from_location,
+          validate: validate)
+      end
       if from_location
         if storage_locations[from_location].nil? && validate
           raise "Storage location #{from_location} not found!"
diff --git a/app/models/event.rb b/app/models/event.rb
index c02ca01da4..3aa230861f 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -70,6 +70,7 @@ def validate_inventory
     e.message << " for #{item} in #{loc}"
     if e.event != self
       e.message.prepend("Error occurred when re-running events: #{e.event.type} on #{e.event.created_at.to_date}: ")
+      e.message += " Please contact the Human Essentials admin staff for assistance."
     end
     raise e
   end
diff --git a/app/models/view/inventory.rb b/app/models/view/inventory.rb
index c2d97667d6..379f713d99 100644
--- a/app/models/view/inventory.rb
+++ b/app/models/view/inventory.rb
@@ -82,7 +82,7 @@ def quantity_for(storage_location: nil, item_id: nil)
 
       if storage_location
         if item_id
-          @inventory.storage_locations[storage_location.to_i].items[item_id.to_i]&.quantity || 0
+          @inventory.storage_locations[storage_location.to_i]&.items&.dig(item_id.to_i)&.quantity || 0
         else
           @inventory.storage_locations[storage_location.to_i]&.items&.values&.map(&:quantity)&.sum || 0
         end
@@ -100,6 +100,7 @@ def storage_locations_for_item(item_id)
     # @param storage_location [Integer]
     # @return [Float]
     def total_value_in_dollars(storage_location: nil)
+      return 0.0 if @inventory.storage_locations[storage_location].nil?
       total = @inventory.storage_locations[storage_location].items.values
         .map { |i| i.value_in_cents ? i.quantity * i.value_in_cents : 0 }.sum
       total.to_f / 100
diff --git a/app/services/donation_create_service.rb b/app/services/donation_create_service.rb
index 67d83aa73a..fb782ef7d8 100644
--- a/app/services/donation_create_service.rb
+++ b/app/services/donation_create_service.rb
@@ -2,10 +2,11 @@ module DonationCreateService
   class << self
     def call(donation)
       Donation.transaction do
-        if donation.save
-          donation.storage_location.increase_inventory(donation.line_item_values)
-          DonationEvent.publish(donation)
+        unless donation.save
+          raise donation.errors.full_messages.join("\n")
         end
+        donation.storage_location.increase_inventory(donation.line_item_values)
+        DonationEvent.publish(donation)
       end
     end
   end
diff --git a/app/services/purchase_create_service.rb b/app/services/purchase_create_service.rb
index 5ae9ddb8c1..16c1718bb5 100644
--- a/app/services/purchase_create_service.rb
+++ b/app/services/purchase_create_service.rb
@@ -2,10 +2,11 @@ class PurchaseCreateService
   class << self
     def call(purchase)
       Purchase.transaction do
-        if purchase.save
-          purchase.storage_location.increase_inventory(purchase.line_item_values)
-          PurchaseEvent.publish(purchase)
+        unless purchase.save
+          raise purchase.errors.full_messages.join("\n")
         end
+        purchase.storage_location.increase_inventory(purchase.line_item_values)
+        PurchaseEvent.publish(purchase)
       end
     end
   end
diff --git a/spec/events/inventory_aggregate_spec.rb b/spec/events/inventory_aggregate_spec.rb
index 207323bacf..e09cb1d443 100644
--- a/spec/events/inventory_aggregate_spec.rb
+++ b/spec/events/inventory_aggregate_spec.rb
@@ -709,6 +709,19 @@
     end
 
     context "subsequent event is incorrect" do
+      it "should handle negative quantities" do
+        next unless Event.read_events?(organization) # only relevant if flag is on
+
+        donation = FactoryBot.create(:donation, organization: organization, storage_location: storage_location1)
+        donation.line_items << build(:line_item, quantity: 100, item: item1)
+        DonationEvent.publish(donation)
+        distribution = FactoryBot.create(:distribution, organization: organization, storage_location: storage_location1)
+        distribution.line_items << build(:line_item, quantity: 90, item: item1)
+        DistributionEvent.publish(distribution)
+        donation.line_items.first.quantity = 20
+        expect { DonationEvent.publish(donation) }.to raise_error(InventoryError)
+      end
+
       it "should add the event to the message" do
         next unless Event.read_events?(organization) # only relevant if flag is on
 
diff --git a/spec/system/purchase_system_spec.rb b/spec/system/purchase_system_spec.rb
index 36f0f46075..0d40190b19 100644
--- a/spec/system/purchase_system_spec.rb
+++ b/spec/system/purchase_system_spec.rb
@@ -197,7 +197,7 @@
 
           it "should display failure with error messages" do
             click_button "Save"
-            expect(page).to have_content('Failed to create purchase due to: ["Vendor must exist", "Amount spent is not a number", "Amount spent in cents must be greater than 0"]')
+            expect(page).to have_content('Failed to create purchase due to: Vendor must exist Amount spent is not a number Amount spent in cents must be greater than 0')
           end
         end
       end