circular mail(A memorandum, letter or notice in either paper or electronic format distributed widely throughout an organization or to a general list of interested parties; Письмо, предназначенное для широкой рассылки)
diffusion(Diffusions – Similar to the Notice, a diffusion is issued for the same purposes
as notices but sent directly by a member country or an international entity to
the countries of their choice. Diffusions are also recorded in the Organization's
police databases.: ...a diffusion circulated by your NCB on 12 August 2020.Paul Siebert)
