MY spouse got transcript from university but its not in sealed in envelope.should put gum on the envelope and seal it
well, following is the usual procedure:
It has to be university envelop. put the transcript inside the university envelop and then stick the flap of envelop with glue. then put university seal/logo on the flap.
N.B: usually dhaka university registrar building takes 200-400 taka for university envelop with seal.