According to the Rule 5 of the European Patent Office (EPO)  Implementing Regulation,

Where according to the European Patent Office regulations  the translation of a document is required, the European Patent Office may require that a certificate that the translation corresponds to the original text be filed within a period to be specified. If the certificate is not filed in due time, such document shall be deemed not to have been filed, unless otherwise provided. 

Prepared by European Patent Registration and Consulting Services
www.european-patent-registration.com [1]
de.linkedin.com/in/europeanpatentregistration