Typically, the plaintiff (or cross-complainant, cross-plaintiff, counter-claimant, counter-plaintiff, third-party plaintiff, etc.) must show that service of process was effected on the defendant (cross-defendant, counter-defendant, cross-defendant, third-party defendant, etc.). This is typically achieved by the filing of an affidavit of service (also known as a proof of service), which gives enough information to allow the court to confirm that valid service has been accomplished. Typically the affidavit states, under oath or penalty of perjury, that service was effected on a named defendant, briefly describes how it was effected, names the person who made service, and gives the place and date service was effected. Once the requisite time to respond to the complaint has passed, the defendant is "in default"; this may be automatic, or it may require the court clerk to enter the default (which may, in turn, require that the plaintiff request entry of the default). Some defaults do not take effect until a set period of time after the clerk acts. The clerk may have to give the defendant notice of his default, affording a chance to have the default vacated.