There have been some recent alterations in relation to the requirements for non-residents in Portugal to have (or not) a fiscal representative.
Crypto currency has started to be used as a payment for purchasing of properties in Portugal, as an outright payment method. However there are alternatives.
The caderneta predial, the document issued by the tax department (finanças) contains useful information, but can be confusing.
There are now new procedures to follow when selling apartments or any property in a multi use building.
Energy certificates are produced for properties in Portugal that are for sale or available to rent, and they give an idea of the energy efficiency of a property.
The non habitual resident scheme offers significant tax breaks for those moving to Portugal, and is a simple system with easy access.