捜そう索さく願ねがい

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Meanings

1

noun

missing person report; request for a police search

Formal term for filing a request with the police to search for a missing person. Often used in the phrase 捜索願を出す.

捜そう索さく願ねがい

Standard kanji spelling for a missing-person search request.

捜そう索さく願ねがい

Variant with okurigana; less common but still seen.

行方ゆくえ不ふ明めい
Refers to the state of being missing; 捜索願 is the formal request to search for such a person.
家いえ出で人にん
A runaway; a 捜索願 may be filed for a runaway, but the term itself is neutral about the reason for disappearance.

Compound of 捜索 (search) and 願 (request, petition). The exact historical derivation is uncertain, but the term is a straightforward legal/police term.