The communication will indicate the deficiencies noted in accordance with D‑IV, 1.2.1, and will state that the opposition will be deemed not to have been filed unless the deficiency or deficiencies are remedied within the time limits indicated in D‑IV, 1.2.1.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/d_iv_1_3_1.htm
Date retrieved: 17 May 2021