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+++ b/guides/source/active_record_validations.md
@@ -327,6 +327,16 @@ class Person < ActiveRecord::Base
end
```
+There is also a `:case_sensitive` option that you can use to define whether the
+confirmation constraint will be case sensitive or not. This option defaults to
+true.
+
+```ruby
+class Person < ActiveRecord::Base
+ validates :email, confirmation: { case_sensitive: false }
+end
+```
+
The default error message for this helper is _"doesn't match confirmation"_.
### `exclusion`