身み元もと保ほ証しょう

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Meanings

1

noun

personal reference; character reference

Used in contexts such as employment, rental agreements, or legal procedures where a person vouches for another's identity and trustworthiness.

somebody, person, one's station in life

元beginning, former time, origin

保protect, guarantee, keep

証evidence, proof, certificate

身み元もと
身元 means 'identity' or 'background'; 身元保証 specifically refers to the act of guaranteeing someone's identity or character.
保ほ証しょう人にん
保証人 is a 'guarantor' (person), while 身元保証 is the abstract concept or process of providing a personal reference.

Compound of 身元 (identity, background) and 保証 (guarantee, assurance).