Pet registration in Portugal | The SIAC system

Pet registration in Portugal | The SIAC system

What is SIAC in Portugal?

SIAC (Sistema de Informação de Animais de Companhia) is, in fact, a system in Portugal related to the management and information of pets. This system aims to electronically identify pets, including dogs and cats, by means of a microchip and a centralized register.

SIAC helps to manage information on pets, such as data on their owners, vaccinations, health history, among other relevant information for their identification and proper care.

Through SIAC, it is possible to guarantee greater control and responsibility in the ownership and care of pets, contributing to their well-being and safety. The system also aims to facilitate the identification of animals in the event of loss, abandonment or other related situations.

How do I register an animal with SIAC?

Registering a pet with SIAC (Sistema de Informação de Animais de Companhia) in Portugal involves a few steps and procedures. Here are the general steps for registering an animal with SIAC:

Contact a Veterinarian

Go to an accredited veterinarian to have the animal microchipped. The vet will insert the microchip under the animal’s skin, usually in the neck or shoulder area.

Electronic identification

The first step is the electronic identification of the animal, which is carried out by placing a microchip subcutaneously. This microchip contains a unique code that will identify the animal throughout its life.

Registration with SIAC

After placing the microchip, the veterinarian will register the animal in SIAC, entering the necessary information into the system, such as the animal’s details, the owner’s details and the microchip’s identification number.

Updating data

Make sure that all the information is correct and up to date in the system. In the event of a change of data, such as a change of address or owner, it is essential to inform SIAC so that the information can be updated.

Keeping data up to date

Throughout the animal’s life, it is important to keep the data in SIAC up to date. Whenever there is a change in the information registered, such as a change of address or contact number, SIAC must be informed so that the data can be corrected.


For detailed information and specific procedures for registering an animal with SIAC, we recommend contacting a trusted veterinarian or visiting SIAC’s official website, where you can find up-to-date guidance on the process of registering pets in Portugal.

With information from the SIAC Portal

Adriano Martins Pinheiro, lawyer in Portugal

tags: pet, puppy, dog, cat, portugal, registration, siac, veterinarian, microship .