This template is used in system messages. Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption, any changes should be tested in the template's /sandbox or /testcases subpages, or in your own user subpage. The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them.
|filter= the number of the filter that uses this message, if several filters use it, use |filter2=, |filter3=, etc., 5 maximum.Only visible in the AbuseFilter interface.
|action= – the type of filter. Acceptable values are allow auto block deauto degroup sternwarning.
|friendly= – changes the display slightly to be a little less bitey.