I

I.A. South Australia Official overprint (Immigration Agent).
I Colombia-Scadta consular overprint for Italy.
i.B. West Irian.
ICAO United Nations inscription for International Civil Aviation Organization.
ICC Indo China, Laos, Vietnam overprint on stamps of India for International Control Commission.
ICHANG China Treaty Port Local stamp.
ICY United Nations inscription for International Cooperation Year.
IDAR India Feudatory State.
IDROVOLANTE Italy air mail overprint.
I.E. South Australia Official overprint (Intestate Estates).
I. E.F. India (Indian Expeditionary Forces).
I.E.F.'D' Mesopotamia overprint on stamps of Turkey.
IERUSALEM Russia overprint for Offices in Turkish Empire.
I GILDI Iceland overprint.
IKAPIAE Greece-Icaria (Nicaria).
IIOPTO CKPNCOPN First stamps of Moldavia, listed under Romania.
ILAVOAMENA Madagascar local issue.
ILE DE LA REUNION Reunion.
ILE ROUAD Rouad.
ILES WALLIS et FUTUNA Wallis and Futuna Islands.
ILO United Nations inscription for International Labor Organization.
IMADI Yemen money unit.
IMCO United Nations inscription for Intergovernmental Maritime Consultative Organization.
IMPERIAL BRITISH EAST AFRICA COMPANY British East Africa.
IMPERIO COLONIAL PORTUGUES Portuguese Africa Postage Due.
IMPRIME Turkey newspaper overprint.
IMPTO. DE GUERRA Spain War Tax stamp.
IMPUESTO DE GUERRA Puerto Rico, Spain overprint.
INCI YIL DONUMU Turkey.
INDE FCAISE French India.
INDIA PORTUGUEZA Portuguese India.
INDOCHINE IndoChina.
INDONESIA (With Republik) Indonesia overprint on stamps of Dutch Indies.
INDONESIA (Without Republik) Netherlands Indies overprint on stamps of Dutch Indies.
INDORE India Feudatory State.
INDUSTRIELLE KRIEGSWIRTSCHAFT Switzerland overprint on stamps for War Board of Trade.
INHAMBANE Inhambane overprint on Mozambique.
INLAND Liberia.
INSELPOST: overprint on WW II German military stamps for German troops in Crete.
INSUFFICIENTLY PREPAID Zanzibar.
INTRUCCION Venezuela.
IONIKON KPATOE lonian Islands.
I.O.V.R. Romania Postal Tax.
I P S A United States Local Post (Independent Postal System of America).
IQUIQUE Peru overprint on stamps of Chile, Chilean Occupation.
i.R. United States Internal Revenue overprint.
IRAN, IRANIENNES Iran (Persia).
IRAQ Mesopotamia overprint on stamps of Turkey.
IRIAN BARAT West Irian overprint and inscription on Indonesia.
I.R. OFFICIAL Great Britain overprint (Inland Revenue).
i.S. South Australia Official overprint (Inspector of Sheep).
ISLAMIQUE De MAURETANIE Mauretanla.
ISLAND Iceland.
ISLAS DE JUAN FERNANDEZ Chile overprint.
ISLAS GALAPAGOS Ecuador Galapagos Islands.
ISLAS MALVINAS Argentine name for Falkland Islands.
ISO Sweden BOGUS local Post.
ISOLE ITALIAN DELL'EGEO Italy, Aegean islands overprint.
ISOLE JONIE lonian islands overprint on stamps of Italy, Italian Occupation.
ISTRIA Jugosiavia overprint on stamps of Italy for Istria.
ITAKARJALA Karelia overprint on stamps of Finland, Finnish Administration.
ITALIA, ITALIANE, ITALIANO Italy.
ITALIANA ISOLE CEFALONIA e ITACA lonian Islands overprint on stamps of Greece.
ITALIA OCCUPAZIONE MILITARE Ionian Islands overprint on stamps of Greece, Italian Occupation.
ITALIA/OCCUPAZIONE MILITARE/ITALIANA ISOLE/CELALONIA E ITACA: Italian Military occupation of the Islands of Cephalonia and Ithaca, on stamps of Greece, overprinted by Italy, 1941.
ITU United Nations inscription for International Telecommunications Union.
IWY United Nations inscription for International Women's Year.
IZMIR HIMAYEI ETFAL CEMIYETI Turkey Tax stamps.