Actual Notice

Someone receiving notice (being informed of a case that could affect their interest - see: Notice) in fact, as opposed to Constructive Notice (where although that person did not receive notice in fact, the law will consider them to have received notice).

Note that constructive notice trumps actual notice.  For example: Someone who is served improperly, but actually receives the papers may dismiss the case for lack of notice; while someone who is properly served (receives constructive notice), but because of a fluke does not in reality receive the papers will not be able to dismiss the case for lack of service.