punctilious

Strictly attentive to minute details of form in action or conduct. synonym: meticulous.

Precise; scrupulous.

Attentive to punctilios; very nice or precise in behavior, ceremony, or intercourse; exact (sometimes, to excess) in the observance of rules or forms prescribed by law or custom.

Synonyms Particular, precise, scrupulous.

Attentive to punctilio; very nice or exact in the forms of behavior, etiquette, or mutual intercourse; precise; exact in the smallest particulars.