Visa
Once in the country, the validity period of a visa or authorized stay can often be extended for a fee if the immigration authorities choose to do so. Staying longer than the period of authorized stay given by the immigration officers is considered illegal immigration even if the visa validity period is not over (i.e. for multiple entry visas) and a form of being "out of status" and the offender may be fined, prosecuted, deported, or even blacklisted (banned) from entering the country again.