Due to the pandemic of COVID-19 in France and the measures imposed by the French authorities to limit contagion, ISSN International Center staff work from home. In the current circumstances, we kindly advise you, whenever possible, to pay your ISSN credits and your subscriptions to the ISSN International Center services by credit card in order to facilitate the management of your requests. You can still pay invoices by bank transfer. However, we are not in a position to guarantee the usual processing time for your requests and the rapid availability of your ISSN credits. We apologize for these temporary difficulties.