The ERES does not define any limitation regarding the formats of documents attached to the registration module and files. We must take into account, however, that certain functionalities of the service, such as the authentic copy, electronic notification or the signature holder, are limited to documents in pdf format.
In relation to the weight of the documents, using the functionality to attach documents from the ERES screens, although there is no specific weight limit defined, files exceeding 30MB in weight are not recommended.
In the method of entering files attached to the records and files that the web services of the service incorporates, documents that do not exceed 129MB can be attached.
Regarding the nomenclature of the documents, it must always follow the following pattern, always in capital letters and avoiding spaces:
DOCUMENT TYPE + SPACE + BRIEF DESCRIPTION + SPACE + DATE (YYYYMMDD).