Claims fees are due upon the filing of the first set of claims, which may be the date of filing or which may occur later (see A‑III, 9 and A-III, 15).Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/a_x_5_2_5.htmDate retrieved: 17 May 20214 references found. Click X to load a reference inside the current page, click on the title to open in a new page.EPO Guidelines - A Formalities ExaminationXGL A Overview Loading...XGL A III 9 Claims fee Loading...XGL A III 15 Late filing of claims Loading...XGL A X 5.2 Due date for specific fees Loading...