The new catalogue of Joint Stamp Issues 2025 is now on line with the section of the stamps issued during the year 2024 fully updated. In order to keep an average of about 100-130 pages per volume facilitating a quick downloading, the year 2024 needed to be separared from the 2022-2023 period (Volume XV) and a new volume numbered XVI, containing years 2024-2025 was created.
This new updated catalogue, the 2025 version in 16 volumes, has now reached 1,900 pages. It contains over 2,280 entries among which more than 1,580 can be considered as true joint issues (unique, se-tenant, twin, concerted or parallel). It describes in total more than 16,100 items, and it is illustrated with above 8,900 pictures, providing also more than 35,100 quotations. This upgrade allowed also to make a comparison of the evolution of the number of issues of joint stamps for statistical purpose, which leads to a graph looking as follow:

It appears that after a strong progression over the years 1980-2010, the number of new yearly issues reached a kind of plateau over the past 15 years, with an average of 40 issues per year. The progression affected only the twin joint issues while the number of parallel/concerted issues remained stable over the past 50 years. However, the number of different products for each issue such as additional souvenir sheets, booklets, miniature sheets or mixed cancelled products, or the number of total stamps per issue did progress as well. In parallel, we have also to observe that the number of abusive joint issues (issues involving a high number of countries not fully controlled by the local postal administrations, but printed centrally) has increased. We will still continue to identify those issues separately, and even if we continue to have them described in the catalogue for the sake of completeness (gray color and italics characters), it will remain up to the individual collectors to decide if they want to include and purchase them. Typically, these stamps will not gain value over time, will be difficult to resell and are usually not accepted in exhibitions.
Joint issues are a mirror of the political state of the world. The increasing number of conflict situations is not in favor of a progression of the number of joint issues. Several planned issues were cancelled during the past five years, due to political concerns. My wish for the next year(s) is to be able to report soon a first joint issue e.g., involving Israel and Iran, North and South Korea or Ukraine and Russia, which would become the best sign of a progression toward world peace.
Among the major improvements, note that at least 25 new items describing mixed FDCs have been added over the period 2021-2024. We own a huge thank to Jaap Sarelse (The Netherlands) for his great work and time spent over the past 30 years in providing this information, finding the items and even trying to create such mixed products whenever possible. The existence of mixed first day cancelled products remains the ultimate proof of the joint character as both postal administrations must have agreed for the production and existence of such items.
On top of the additions of new 2024 issues described in previous blog pages, one has to note the following:
On September 14, 2024, Bangladesh re-issued an older stamp from 2001 with a handstamp “DHAKAPEX”. This issue is now described in the catalogue under the original stamp heading [T20011009] together with all the other stamps of the same series. This gave the opportunity also to update the texts and images of these stamps in the catalogue as this entry was only partially illustrated. As much as 75 new images over three pages were introduced to illustrate this entry.

The International Telecommunication Union (ITU) is celebrating during the year 2025, its 160th anniversary. The UPU did send on October 28, 2024 a circular to all its members, asking that if they want to commemorate this anniversary, they can use the new logo of the event. The way this letter is presented clearly shows that this is not a call for a joint issue. So, at this stage and in absence of further notice, stamps that will be produced during the year 2025 and bearing the below logo will not be considered as joint, as they are simply commemorative stamps based on individual initiatives.

On the contrary, the design of the 2026 PostEurop stamps to be issued at the occasion of the 70th anniversary of PostEurop, was released by beginning of January 2025. A common stamp will be used at this occasion, based on a contest that a Finnish group did win.

One has also to note a small modification regarding the December 20, 2021 issue involving Colombia and Mexico. The Mexican stamps were issued on December 20, 2021, but the Colombian stamp became only available on January 25, 2022. However, it appears that the Colombian FDC and the mixed FDC are still cancelled from December 20, 2021. This issue which was initailly considered as a Concerted one under the heading number C20211220 is now reported as the twin issue T20211220.
The same modification affected the stamps issued on October 16, 2023, involving Vietnam and India. Small amounts of Vietnam stamps became available at one post office at the original day of issue (April 28, 2023), but stamps were retrieved after sale of the first batch of 4,000 units. India announced three times the release of their stamps until they became eventually available on October 16, 2023. These delays led to consider initially this series as Concerted. However, the mixed FDC of this issue is cancelled with dates from October 16, 2023 for both countries and therefore these stamps are filed as twin [T20231016]. Covers with Vietnamese stamps cancelled before October 16, 2023 are rarities.


























































































































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