Contact the embassy
Americas & Oceania
Verify an issued Tonga visa
No official online check exists; verify through the embassy that serves Bangladesh.
No online check — contact the embassy
Tonga has no official online way to check a visa. To confirm a status, contact the Tonga mission that serves Bangladesh.
No mission accredited to Bangladesh could be confirmed from an official source (mission site, host MFA or Bangladesh MOFA). Wikipedia lead (Canberra) not confirmed: Tonga's Canberra mission concurrent accreditations found online do not include Bangladesh.