প্ৰমাণক (Assamese) [ Roman: pro.ma.nok]
    Contributed by: Anjal Borah (অঞ্জল বৰা) on 2010-10-26
    Ref: হেমকোষ - ১২শ সংস্কৰণ (২০০৬ চন)
    1. (Abstract Noun) Written acknowledgment of payment received