diff --git a/lib/membership_fees/membership_fee_type.ex b/lib/membership_fees/membership_fee_type.ex
index f96920d..01ae625 100644
--- a/lib/membership_fees/membership_fee_type.ex
+++ b/lib/membership_fees/membership_fee_type.ex
@@ -45,6 +45,8 @@ defmodule Mv.MembershipFees.MembershipFeeType do
 
     update :update do
       primary? true
+      # require_atomic? false because validation queries (member/cycle counts) are not atomic
+      # DB constraints serve as the final safeguard if data changes between validation and update
       require_atomic? false
       # Note: interval is NOT in accept list - it's immutable after creation
       accept [:name, :amount, :description]
@@ -52,6 +54,9 @@ defmodule Mv.MembershipFees.MembershipFeeType do
 
     destroy :destroy do
       primary? true
+
+      # require_atomic? false because validation queries (member/cycle/settings counts) are not atomic
+      # DB constraints serve as the final safeguard if data changes between validation and delete
       require_atomic? false
     end
   end