diff --git a/lib/stripe/resources/bank_account.rb b/lib/stripe/resources/bank_account.rb
index 36e85bfb4..5f4c17a25 100644
--- a/lib/stripe/resources/bank_account.rb
+++ b/lib/stripe/resources/bank_account.rb
@@ -64,12 +64,12 @@ def self.retrieve(_id, _opts = nil)
     end
 
     def self.delete(id, params = {}, opts = {})
-      request_stripe_object(
-        method: :delete,
-        path: "#{resource_url}/#{id}",
-        params: params,
-        opts: opts
-      )
+      raise NotImplementedError,
+            "Bank accounts cannot be deleted without a customer ID or an " \
+            "account ID. Delete a bank account using " \
+            "`Customer.delete_source('customer_id', 'bank_account_id')` " \
+            "or `Account.delete_external_account('account_id', " \
+            "'bank_account_id')`"
     end
 
     def delete(params = {}, opts = {})
@@ -82,12 +82,11 @@ def delete(params = {}, opts = {})
     end
 
     def self.list(filters = {}, opts = {})
-      request_stripe_object(
-        method: :delete,
-        path: resource_url.to_s,
-        params: filters,
-        opts: opts
-      )
+      raise NotImplementedError,
+            "Bank accounts cannot be listed without a customer ID or an " \
+            "account ID. List bank accounts using " \
+            "`Customer.list_sources('customer_id')` " \
+            "or `Account.list_external_accounts('account_id')`"
     end
   end
 end
diff --git a/lib/stripe/resources/card.rb b/lib/stripe/resources/card.rb
index 1ef141ede..5f9f3c160 100644
--- a/lib/stripe/resources/card.rb
+++ b/lib/stripe/resources/card.rb
@@ -42,12 +42,11 @@ def self.retrieve(_id, _opts = nil)
     end
 
     def self.delete(id, params = {}, opts = {})
-      request_stripe_object(
-        method: :delete,
-        path: "#{resource_url}/#{id}",
-        params: params,
-        opts: opts
-      )
+      raise NotImplementedError,
+            "Card cannot be deleted without a customer ID or an account " \
+            "ID. Delete a card using `Customer.delete_source(" \
+            "'customer_id', 'card_id')` or " \
+            "`Account.delete_external_account('account_id', 'card_id')`"
     end
 
     def delete(params = {}, opts = {})
@@ -60,12 +59,11 @@ def delete(params = {}, opts = {})
     end
 
     def self.list(filters = {}, opts = {})
-      request_stripe_object(
-        method: :delete,
-        path: resource_url.to_s,
-        params: filters,
-        opts: opts
-      )
+      raise NotImplementedError,
+            "Cards cannot be listed without a customer ID or an account " \
+            "ID. List cards using `Customer.list_sources(" \
+            "'customer_id')` or " \
+            "`Account.list_external_accounts('account_id')`"
     end
   end
 end