Synonyms of duly in English:

duly


See US English definition of duly

See UK English definition of duly

See Spanish definition of debidamente

adverb

1‘the document was duly signed and authorized’

SYNONYMS
properly, correctly, in due manner, rightly, fittingly, fitly, aptly, appropriately, suitably
ANTONYMS

improperly

2‘the footman duly arrived to collect Alice’

SYNONYMS
at the proper time, at the right time, in due time, on time, punctually