The Belgian government issued a number of Propaganda labels for the Flemish Legion. They are as follows:
On 23 December 1941, the Brussels firm of De Reume printed four miniature souvenir sheets with four labels each, shown above. Each label shows a symbolic propaganda representation between the medieval Flemish Knights and the Legionnaires. Each label also bears the Legion emblem with the inscription reading "Volunteer Legion Flanders/Military Mail/Eastern Front/1941." The labels have a surtax value of 50 Francs each. The proceeds were used to benefit the Legionnaires or family members. A total of 30,000 sets was issued.

On 9 August 1943 six miniature sheets of four were printed in serial numbered identifying the following emperors and an empress of the Teutonic Holy Roman Empire and Hapsburg Dynasty:
5 Francs - Blue-green - Otto the Great
10 Francs - Orange-red - Joseph II of Austria
15 Francs - Black-brown - Maria Theresia of Austria
20 Francs - Lilac-pink - Maximilian of Austria
50 Francs - Orange-brown - Charlemagne
100 Francs - Blue - Charles V
Each label has either shields with crests of the monarchs depicted or shields inscribed "Wapen SS." All labels bear the inscription "SS Feldpost," and the names of the rulers are printed in Flemish and German. A total of 30,000 complete sets, were issued. They illustrate a facet of SS ideology, an interest of many SS leaders in medieval history, especially in the low countries.

In 1944 a set of 4 miniature sheets illustrating Flemish Waffen-SS in military scenes were printed in horz. format, perf. and imperf. These labels are inscribed "SS FELDPOST /Wapen SS," all bearing values from 10 Francs to 100 Francs.

These issues were prepared for sale but never issued. Only 6000 perforated and 1200 imperforate sets were printed.

In late 1944, the 50Franc Waffen-SS label was issued with overprinted "LANGEMARK" in red. This issue commemorated the Assault Brigade Langemark. This unissued label was the last to be printed. A total of 3600 labels were overprinted.

The Flemish Legion labels issued from 1941 to 1943 were used extensively on canceled to order philatelic covers and on propaganda postcards. There exist many varieties in imperf., inverted overprints, etc.

Flemish Feldpost labels were used with FPN 07515, which was the mailing address of the SS-Flemish recruiting headquarters in Brussel.

The following feldpost numbers were assigned to the SS Flemish recruiting offices:
FPN 07515 - Sammelfeldpostnummer Brussels
FPN 07515 AP - SS-Abschnitt Flandern
FPN 07515 CA - Ersatz-kommando der WSS Flandern
FPN 07515 CN - Führsorge-offizier der WSS in Flandern und Wallonien
FPN 09425 - Sammelfeldpostnummer Antwerpen.
Many propaganda, recruiting postcards were printed for Flemish volunteers. In addition there is another set of four labels, issued to aid Belgian POWs in Germany. These bilingual stamps have the inscription "BELGIQUE-BELGIE/POUR NOS PRISONNIERS DE GUERRE/VOOR ONZE KRIJGSGEVANGENEN." Three labels have 5 Franc values and one with 10 Franc.