diff --git a/Gemfile.lock b/Gemfile.lock
index 37c1fe9..a6007c4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -233,18 +233,18 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.9)
+    nokogiri (1.19.1)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.18.9-aarch64-linux-gnu)
+    nokogiri (1.19.1-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.9-arm-linux-gnu)
+    nokogiri (1.19.1-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.9-arm64-darwin)
+    nokogiri (1.19.1-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.9-x86_64-darwin)
+    nokogiri (1.19.1-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.9-x86_64-linux-gnu)
+    nokogiri (1.19.1-x86_64-linux-gnu)
       racc (~> 1.4)
     orm_adapter (0.5.0)
     pg (1.5.9)
@@ -266,7 +266,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.18)
+    rack (3.1.20)
     rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
diff --git a/app/admin/applications.rb b/app/admin/applications.rb
index 3bc5eff..2f23f53 100644
--- a/app/admin/applications.rb
+++ b/app/admin/applications.rb
@@ -17,7 +17,15 @@
     button_to "Send Offer", send_offer_path(application) if application.offer_status == "not_offered"
   end
 
-  filter :user_id, label: "User", as: :select, collection: -> { Application.all.map { |app| [app.display_name, app.user_id]}.uniq.sort}
+  filter :user_email, as: :select,
+    collection: -> { User.joins(:applications).distinct.order(:email).pluck(:email) },
+    label: "User Email"
+  filter :last_name, as: :select,
+    collection: -> { Application.distinct.order(:last_name).pluck(:last_name) },
+    label: "Last Name"
+  filter :first_name, as: :select,
+    collection: -> { Application.distinct.order(:first_name).pluck(:first_name) },
+    label: "First Name"
   filter :offer_status, as: :select
   filter :result_email_sent, as: :select
   filter :workshop_selection1, label: "workshop_selection1", as: :select, collection: -> { Workshop.all.map { |mapp| [mapp.instructor, mapp.instructor]}.sort }
@@ -81,14 +89,14 @@ def load_index_batch_data
     total_cost = cost_lodging + cost_partner
     balance_due = total_cost - ttl_paid
     panel "Payment Activity -- [Balance Due: #{number_to_currency(balance_due)} Total Cost: #{number_to_currency(total_cost)}]" do
-      table_for application.user.payments.where(conf_year: application.conf_year) do #application.user.payments.current_conference_payments
+      table_for application.user.payments.where(conf_year: application.conf_year) do
         column(:id) { |aid| link_to(aid.id, admin_payment_path(aid.id)) }
         column(:account_type) { |atype| atype.account_type.titleize }
         column(:transaction_type)
         column(:transaction_date) {|td| Date.parse(td.transaction_date) }
         column(:total_amount) { |ta|  number_to_currency(ta.total_amount.to_f / 100) }
       end
-      text_node link_to("[Add Manual Payment]", new_admin_payment_path(:user_id => application))
+      text_node link_to("[Add Manual Payment]", new_admin_payment_path(user_id: application.user_id))
     end
 
 
diff --git a/app/admin/payments.rb b/app/admin/payments.rb
index b8478dd..d700870 100644
--- a/app/admin/payments.rb
+++ b/app/admin/payments.rb
@@ -3,36 +3,25 @@
   action_item :delete_manual_payment, only: :show do
     link_to('Delete Manual Payment', delete_manual_payment_path(payment), method: :post, data: { confirm: 'Are you sure?' }) if payment.transaction_type == "ManuallyEntered"
   end
-  menu parent: "User Mangement", priority: 2
+  menu parent: "User Management", priority: 2
 
-  # See permitted parameters documentation:
-  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
-  #
-  # Uncomment all parameters which should be permitted for assignment
-  #
   permit_params :transaction_type, :transaction_status, :transaction_id, :total_amount, :transaction_date, :account_type, :result_code, :result_message, :user_account, :payer_identity, :timestamp, :transaction_hash, :user_id, :conf_year
-  #
-  # or
-  #
-  # permit_params do
-  #   permitted = [:transaction_type, :transaction_status, :transaction_id, :total_amount, :transaction_date, :account_type, :result_code, :result_message, :user_account, :payer_identity, :timestamp, :transaction_hash, :user_id]
-  #   permitted << :other if params[:action] == 'create' && current_user.admin?
-  #   permitted
-  # end
-  
-  # filter :user, as: :select, collection: -> { User.all.order(:email) }
-  # filter user.current_application, label: "Last Name (Starts with)"
-  # filter :application_first_name_start, label: "First Name (Starts with)"
 
   scope :current_conference_payments
   scope :all
 
-  filter :user_id, as: :select,
-    # collection: -> { User.all.order(:email) },
-    collection: -> { Application.all.order(:last_name).map { |app| [app.display_name, app.user_id] } },
-    label: "Name"
-  filter :conf_year, as: :select
-
+  filter :payer_identity, as: :select,
+    collection: -> { Payment.order(:payer_identity).distinct.pluck(:payer_identity) },
+    label: "User Email"
+  filter :user_applications_last_name, as: :select,
+    collection: -> { Application.joins(user: :payments).distinct.order(:last_name).pluck(:last_name) },
+    label: "Last Name"
+  filter :user_applications_first_name, as: :select,
+    collection: -> { Application.joins(user: :payments).distinct.order(:first_name).pluck(:first_name) },
+    label: "First Name"
+  filter :payments_conf_year, as: :select,
+    collection: -> { Payment.order(:conf_year).distinct.pluck(:conf_year) },
+    label: "Payment Conf Year"
 
   index do
     selectable_column
@@ -47,23 +36,17 @@
       number_to_currency(amount.total_amount.to_f / 100)
     end
     column :transaction_status
-    # column :transaction_id
-
     column :transaction_date
     column :account_type
     column :result_code
     column :result_message
-    # column :user_account
-    # column :payer_identity
-    # column :timestamp
-    # column :transaction_hash
     column :created_at
     column :updated_at
   end
 
   show do
     attributes_table do
-      row :user do |user| 
+      row :user do |user|
         if (app = payment.user.applications.find_by(conf_year: ApplicationSetting.get_current_app_year))
           link_to(app.display_name, admin_application_path(app))
         else
@@ -100,7 +83,7 @@
         li "<strong>User: #{User.find(params[:user_id]).display_name}</strong>".html_safe
         f.input :user_id, input_html: {value: params[:user_id]}, as: :hidden
       else
-        f.input :user, as: :select, :collection => User.all.map { |u| ["#{u.email}", u.id] }.sort  # Application.active_conference_applications.map { |a| ["#{a.display_name}", a.user_id] }.sort
+        f.input :user, as: :select, :collection => User.all.map { |u| ["#{u.email}", u.id] }.sort
       end
       li "Conf Year #{f.object.conf_year}" unless f.object.new_record?
       f.input :conf_year, input_html: {value: ApplicationSetting.get_current_app_year} unless f.object.persisted?
@@ -112,7 +95,7 @@
       f.input :account_type, collection: ['scholarship', 'special', 'other']
       f.input :result_code, as: :hidden, :input_html => { value: "Manually Entered" } # 'Manually Entered'
       f.input :result_message, as: :hidden, :input_html => { value: "This was manually entered by #{current_admin_user.email}" }
-      f.input :timestamp, as: :hidden, :input_html => { value: DateTime.now.strftime("%Q").to_i } # DateTime.now.strftime("%Q").to_i
+      f.input :timestamp, as: :hidden, :input_html => { value: DateTime.now.strftime("%Q").to_i }
     end
     f.actions
   end
diff --git a/app/models/payment.rb b/app/models/payment.rb
index 6d9177d..ba1fd8c 100644
--- a/app/models/payment.rb
+++ b/app/models/payment.rb
@@ -34,7 +34,13 @@ def self.ransackable_associations(auth_object = nil)
   end
 
   def self.ransackable_attributes(auth_object = nil)
-    ["account_type", "conf_year", "created_at", "id", "id_value", "payer_identity", "result_code", "result_message", "timestamp", "total_amount", "transaction_date", "transaction_hash", "transaction_id", "transaction_status", "transaction_type", "updated_at", "user_account", "user_id"]
+    ["account_type", "conf_year", "created_at", "id", "id_value", "payer_identity", "payments_conf_year", "result_code", "result_message", "timestamp", "total_amount", "transaction_date", "transaction_hash", "transaction_id", "transaction_status", "transaction_type", "updated_at", "user_account", "user_id"]
+  end
+
+  # Disambiguate conf_year when joining associated tables in Ransack searches.
+  # This forces the filter to reference the payments table explicitly.
+  ransacker :payments_conf_year do |parent|
+    parent.table[:conf_year]
   end
 
 
diff --git a/spec/models/payment_spec.rb b/spec/models/payment_spec.rb
index 96eee72..f8d4495 100644
--- a/spec/models/payment_spec.rb
+++ b/spec/models/payment_spec.rb
@@ -79,7 +79,7 @@
       it 'returns the correct attributes' do
         expected_attributes = [
           "account_type", "conf_year", "created_at", "id", "id_value",
-          "payer_identity", "result_code", "result_message", "timestamp",
+          "payer_identity", "payments_conf_year", "result_code", "result_message", "timestamp",
           "total_amount", "transaction_date", "transaction_hash",
           "transaction_id", "transaction_status", "transaction_type",
           "updated_at", "user_account", "user_id"
diff --git a/yarn.lock b/yarn.lock
index e8f2440..4c10751 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -461,9 +461,9 @@ ignore@^5.2.4:
   integrity sha512-5Fytz/IraMjqpwfd34ke28PTVMjZjJG2MPn5t7OE4eUCUNf8BAa7b5WUS9/Qvr6mwOQS7Mk6vdsMno5he+T8Xw==
 
 immutable@^4.0.0:
-  version "4.3.5"
-  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.3.5.tgz#f8b436e66d59f99760dc577f5c99a4fd2a5cc5a0"
-  integrity sha512-8eabxkth9gZatlwl5TBuJnCsoTADlL6ftEr7A4qgdaTsPyreilDSnUk57SO+jfKcNtxPa22U5KK6DSeAYhpBJw==
+  version "4.3.8"
+  resolved "https://registry.yarnpkg.com/immutable/-/immutable-4.3.8.tgz#02d183c7727fb2bb1d5d0380da0d779dce9296a7"
+  integrity sha512-d/Ld9aLbKpNwyl0KiM2CT1WYvkitQ1TSvmRtkcV8FKStiDoA7Slzgjmb/1G2yhKM1p0XeNOieaTbFZmU1d3Xuw==
 
 is-binary-path@~2.1.0:
   version "2.1.0"
@@ -529,9 +529,9 @@ micromatch@^4.0.4:
     picomatch "^2.3.1"
 
 minimatch@^3.1.2:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.2.tgz#19cd194bfd3e428f049a70817c038d89ab4be35b"
-  integrity sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.4.tgz#89d910ea3970a77ac8edfd30340ccd038b758079"
+  integrity sha512-twmL+S8+7yIsE9wsqgzU3E8/LumN3M3QELrBZ20OdmQ9jB2JvW5oZtBEmft84k/Gs5CG9mqtWc6Y9vW+JEzGxw==
   dependencies:
     brace-expansion "^1.1.7"