F09_P08: Undercover Address Post Office Box 506, Lisbon

1942 August 8, Reverse side - Envelope from Suno, Italy to Lisbon.: Blue envelope with cursive handwriting in black ink. Adhesive sticker at the bottom half with censorship notification. Multiple overprint cancellations present in black ink and purple ink.
1942 August 8, Reverse side - Envelope from Suno, Italy to Lisbon.

Blue envelope with cursive handwriting in black ink. Adhesive sticker at the bottom half with censorship notification. Multiple overprint cancellations present in black ink and purple ink.

Name/Title

F09_P08: Undercover Address Post Office Box 506, Lisbon

Entry/Object ID

2007.9.8

Scope and Content

1942 August 8, envelope from Suno, Italy to Lisbon.

Context

Probably the least secret of all World War II undercover addresses was Post Office Box 506, Lisbon, Portugal, operated by the Thomas Cook & Son Ltd. travel agency of London. July 1940 press advertisements in Britain stated that mail service would be available to Belgium, Czechoslovakia, Danzig, Denmark, German-occupied France, Germany, Holland, Italy and Italian colonies, Luxembourg, Norway, German-occupied Poland, and the Channel Islands. The list was later expanded to include Bulgaria, Estonia, Finland, Greece, Hungary, Latvia, Lithuania, Romania, and Yugoslavia. The Cook firm collected a fee for the service, and mail handled through the system was subject to British censorship in both directions, but in a way that would not be revealed to the Axis countries' postal authorities and censors. A May 27, 1942, letter from Vichy France to the undercover address Box 506, Lisbon, with May 27, 1942, arrival backstamp, censored by Great Britain at London. An August 8, 1942, letter from Suno, Italy, to Box 506, Lisbon, censored by Italy at Milan and by Great Britain at London, remailed by Thomas Cook & Son Ltd. with address label pasted over Portuguese address. The 2%-pence British stamp has the Thomas Cook firm's TCS perforated initials.

Collection

Nazi Scourge I: Primary Exhibition

Category

Cover
Philatelic Material

Lexicon

Nomenclature 4.0

Nomenclature Secondary Object Term

Envelope

Nomenclature Primary Object Term

Container, Document

Nomenclature Sub-Class

Writing Accessories

Nomenclature Class

Written Communication T&E

Nomenclature Category

Category 06: Tools & Equipment for Communication

Archive Details

Date(s) of Creation

1942 - Aug 1942

Primary Language

German

Ethnography

Cultural Region

Region

Central Europe

Continent

Europe

Dimensions

Dimension Description

Measurement of the full length and width of the archive.

Width

3-7/8 in

Length

5-1/2 in

Relationships

Related Places

Place

City

Lisbon

Country

Portugal, Italy

Region

Western Europe, Southern Europe

Continent

Europe

General Notes

Note Type

Cataloging Note

Note

C. Walrich - Updated (Jan 22 2026) C. Walrich - Updated Title (Feb 26 2026) C. Walrich - Back-Up Material (Mar 12 2026) C. Walrich - Back-Up PDF (May 7 2026)