In Portugal, the use of certified invoicing software is a legal requirement for the vast majority of companies. Choosing the right solution means complying with the law, simplifying accounting and saving time in daily operations.
What is certified software?
Certified invoicing software automatically communicates with the Tax Authority, ensures the integrity of records and issues documents in compliance with Portuguese legislation.
Solutions tailored to each business
Strong Answer works with references such as Zone Soft, Sage 50cloud and Moloni. Each solution has strengths depending on the sector: retail, services, restaurants, industry or commerce.
Integration with point of sale
For shops and restaurants, invoicing should be integrated with the POS. This avoids double data entry, reduces errors and speeds up customer service.
Support and legal updates
Tax legislation changes frequently. A trusted partner ensures your software is always up to date and that your team knows how to use it correctly.
Invoice simply and securely
Discover the best invoicing solution for your business. Strong Answer helps with selection, installation, data migration and user training.




