You do not have to do this, but it's good practice.

您并不是必须要这样做，但这是一种很好的做法。

youdao

Some words, not expressions can be used instead of, do not have to do every time.

一些言语，不是表情可以代替的，不要每次都当作无所谓。

youdao

Gucci: In a perfect world, I would enjoy my work if I do not have to do much, and make lots of money!

古奇：在理想的状态下，如果我不用做什么就能挣很多钱，那我就会喜欢我的工作。

youdao

Professor Nyokong says she wants to support young women in science so they do not have to experience this.

VOA: special.2009.05.13

But hopefully, you will not be satisfied to just make a general statement here when we do have these glitches.

但是希望，大家不会仅,仅因为大致符合就满意了,毕竟还有些小偏差。

麻省理工公开课 - 化学原理课程节选

You can use it to show that you have or do not have, posses or do not possess, something tangible or intangible.

你可以用它来表示你有或者没有的东西，不管是这些东西是有形还是无形，都可以通用。

I have 课堂 - SpeakingMax英语口语达人

If you have Sky TV, Virgin Media or Freesat on all your TV sets, then you do not have to do anything.

BBC: Northern Ireland digital switch catches some on hop

If you have Sky TV, Virgin Media, freesat or Freesat from Sky on all your TV sets, then you do not have to do anything.

BBC: Northern Ireland digital switchover now under way

Unfortunately for the likes of HSBC, JPMorgan Chase and Citigroup, prosperous clients are discovering that they do not have to do their Internet banking with banks.

FORBES: Magazine Article