Those who previously held South African citizenship (other than by naturalization) are always entitled to permanent residence in South Africa and may apply to resume (naturalize) their South African citizenship after indefinitely returning so long there is sufficient proof of previously held South African citizenship. The permanent residence holder will then be required to reside in South Africa until (they) become eligible to restore or naturalize as a South African citizen. The application for resumption of South African citizenship requires proof of residence in South Africa for one year immediately prior to the application. Municipal rates and other utility bills are usually accepted.