It is compulsory for all companies to provide a physical address in the opening process. In some city halls it is permitted to use a residential address, but this will depend on the type of company and the activities it will be carrying out;In the case of MEI, according to the National Statute for Micro and Small Businesses (Complementary Law No. 123 of 2006), it can be used for any activity. See below:
Art. 18-A - § 25. The MEI may use its residence as the establishment's headquarters, when it is not essential to have its own place to carry out the activity.