Questions & Answers about Você tem certeza?
In most of Brazil, você is the normal, neutral everyday way to say you to one person.
A few useful comparisons:
- você = common, neutral
- o senhor / a senhora = more formal, respectful
- tu = used in some regions and social groups
So Você tem certeza? sounds very natural in Brazilian Portuguese.
Yes. That is very common.
Portuguese often omits subject pronouns when the meaning is clear from context. So both are natural:
- Você tem certeza?
- Tem certeza?
Including você can add a little emphasis, clarity, or contrast.