diff --git a/app/components/admin/action_component.rb b/app/components/admin/action_component.rb
index 2235bb682..33e00e01d 100644
--- a/app/components/admin/action_component.rb
+++ b/app/components/admin/action_component.rb
@@ -68,6 +68,8 @@ class Admin::ActionComponent < ApplicationComponent
         else
           t("admin.actions.confirm_action", action: text, name: record_name)
         end
+      elsif options[:confirm].respond_to?(:call)
+        options[:confirm].call(record_name)
       else
         options[:confirm]
       end
diff --git a/app/components/shared/moderation_actions_component.html.erb b/app/components/shared/moderation_actions_component.html.erb
index 9f6fc1346..a3aed9369 100644
--- a/app/components/shared/moderation_actions_component.html.erb
+++ b/app/components/shared/moderation_actions_component.html.erb
@@ -17,7 +17,7 @@
       path: block_moderation_user_path(author),
       id: dom_id(author, "#{dom_id(record)}_block_author"),
       method: :put,
-      confirm: true
+      confirm: ->(name) { t("moderation.users.index.confirm_block", name: name) }
     ) %>
   <% end %>
 </div>
diff --git a/app/views/moderation/users/index.html.erb b/app/views/moderation/users/index.html.erb
index c2617282a..2e85185e3 100644
--- a/app/views/moderation/users/index.html.erb
+++ b/app/views/moderation/users/index.html.erb
@@ -22,8 +22,18 @@
                 <%= t("moderation.users.index.hidden") %>
               <% else %>
                 <%= render Admin::TableActionsComponent.new(user, actions: []) do |actions| %>
-                  <%= actions.action(:hide, text: t("moderation.users.index.hide"), method: :put) %>
-                  <%= actions.action(:block, text: t("moderation.users.index.block"), method: :put) %>
+                  <%= actions.action(
+                    :hide,
+                    text: t("moderation.users.index.hide"),
+                    confirm: ->(name) { t("moderation.users.index.confirm_hide", name: name) },
+                    method: :put
+                  ) %>
+                  <%= actions.action(
+                    :block,
+                    text: t("moderation.users.index.block"),
+                    confirm: ->(name) { t("moderation.users.index.confirm_block", name: name) },
+                    method: :put
+                  ) %>
                 <% end %>
               <% end %>
             </td>
diff --git a/config/locales/en/moderation.yml b/config/locales/en/moderation.yml
index 473e7238b..ff0fb98c6 100644
--- a/config/locales/en/moderation.yml
+++ b/config/locales/en/moderation.yml
@@ -102,6 +102,8 @@ en:
     users:
       index:
         block: Block
+        confirm_block: "Are you sure? This will hide the user \"%{name}\" and all their contents."
+        confirm_hide: "Are you sure? This will hide the user \"%{name}\" without hiding their contents."
         hidden: Blocked
         hide: Hide
         search_placeholder: email or name of user
diff --git a/config/locales/es/moderation.yml b/config/locales/es/moderation.yml
index 14d2c4d47..b5580317a 100644
--- a/config/locales/es/moderation.yml
+++ b/config/locales/es/moderation.yml
@@ -102,6 +102,8 @@ es:
     users:
       index:
         block: Bloquear
+        confirm_block: "¿Seguro? Esto ocultará a \"%{name}\" así como todos sus contenidos."
+        confirm_hide: "¿Seguro? Esto ocultará a \"%{name}\" sin ocultar sus contenidos."
         hidden: Bloqueado
         hide: Ocultar
         search_placeholder: email o nombre de usuario
diff --git a/spec/system/admin/activity_spec.rb b/spec/system/admin/activity_spec.rb
index 537fe6c34..ee6023993 100644
--- a/spec/system/admin/activity_spec.rb
+++ b/spec/system/admin/activity_spec.rb
@@ -217,7 +217,9 @@ describe "Admin activity" do
       visit proposal_path(proposal)
 
       within("#proposal_#{proposal.id}") do
-        accept_confirm("Are you sure? Block author \"#{proposal.author.name}\"") { click_button "Block author" }
+        accept_confirm("Are you sure? This will hide the user \"#{proposal.author.name}\" and all their contents.") do
+          click_button "Block author"
+        end
 
         expect(page).to have_current_path(proposals_path)
       end
@@ -239,9 +241,11 @@ describe "Admin activity" do
       visit moderation_users_path(search: user.username)
 
       within("#moderation_users") do
-        click_button "Block"
+        accept_confirm { click_button "Block" }
       end
 
+      expect(page).to have_content "The user has been blocked"
+
       visit admin_activity_path
 
       within first("tbody tr") do
diff --git a/spec/system/admin/hidden_comments_spec.rb b/spec/system/admin/hidden_comments_spec.rb
index d92b811cd..36902e4d8 100644
--- a/spec/system/admin/hidden_comments_spec.rb
+++ b/spec/system/admin/hidden_comments_spec.rb
@@ -13,7 +13,9 @@ describe "Admin hidden comments", :admin do
     visit proposal_path(proposal)
 
     within("#proposal_#{proposal.id}") do
-      accept_confirm("Are you sure? Block author \"#{proposal.author.name}\"") { click_button "Block author" }
+      accept_confirm("Are you sure? This will hide the user \"#{proposal.author.name}\" and all their contents.") do
+        click_button "Block author"
+      end
     end
 
     expect(page).to have_current_path proposals_path
diff --git a/spec/system/moderation/budget_investments_spec.rb b/spec/system/moderation/budget_investments_spec.rb
index f24291c73..76d3f7c2f 100644
--- a/spec/system/moderation/budget_investments_spec.rb
+++ b/spec/system/moderation/budget_investments_spec.rb
@@ -23,7 +23,9 @@ describe "Moderate budget investments" do
     login_as(mod.user)
     visit budget_investment_path(budget, investment)
 
-    accept_confirm("Are you sure? Block author \"#{investment.author.name}\"") { click_button "Block author" }
+    accept_confirm("Are you sure? This will hide the user \"#{investment.author.name}\" and all their contents.") do
+      click_button "Block author"
+    end
 
     expect(page).to have_current_path(budget_investments_path(budget))
     expect(page).not_to have_content(investment.title)
diff --git a/spec/system/moderation/users_spec.rb b/spec/system/moderation/users_spec.rb
index fa2ace29f..d9e92e5b4 100644
--- a/spec/system/moderation/users_spec.rb
+++ b/spec/system/moderation/users_spec.rb
@@ -24,7 +24,9 @@ describe "Moderate users" do
     visit debate_path(debate1)
 
     within("#debate_#{debate1.id}") do
-      accept_confirm("Are you sure? Block author \"#{debate1.author.name}\"") { click_button "Block author" }
+      accept_confirm("Are you sure? This will hide the user \"#{debate1.author.name}\" and all their contents.") do
+        click_button "Block author"
+      end
     end
 
     expect(page).to have_current_path(debates_path)
@@ -64,7 +66,8 @@ describe "Moderate users" do
     within("#moderation_users") do
       expect(page).to have_content citizen.name
       expect(page).not_to have_content "Blocked"
-      click_button "Block"
+
+      accept_confirm { click_button "Block" }
     end
 
     within("#moderation_users") do