Recommended Practice based on International Guidelines
The UN guidance recommends that legislation clearly identify the person or head of institution assuming custody of infant notify the registrar providing information regarding date and place of finding, sex and approximate birth date of child, name and address of person/institution reporting finding and any other information requested by registrar. The entry should be marked as "foundling" (or similar) and information about parentage left blank. If child is later identified, the foundling registration should be voided and placed under seal
To avoid statelessness, foundlings who are discovered in the territory should be considered to have parents possessing nationality of that State, unless there is proof to the contrary
Indonesia
Legal Analysis
The person who found the child must report to the birth, together with a police report. The law is silent regarding the nationality determination for the child.
Law Source