"Don't forget to bring your passport."

Translation: 别忘记带护照。

[ShannAwesome]

"Your" is implied, since "don't forget passport" won't make sense in English

[uncannyrain]

Yes, but 'don't forget THE passport' would make sense in English. Same as in 'don't forget your/the money'.
Can't we use 不要 instead of 别 here?

[KX3.]

It is acceptable and is more colloquial.

[notbad8]

Should be 别忘记带你的护照

[Cecil164832]

Do you really need 带? "Don't forget your passport" means the same thing.

[Dr_Jerry]

I mean, we say that in English, but to be clear and without a context you really need 带. FWIW, in China a close friend would probably simply say 护照呢? and you would know he was reminding you to bring it, just like you would do in English.

[Dr_Jerry]

Seriously? Just a few questions back Duo was requiring 不要 for "don't". Here, it's not accepted.

[quadrin]

Haha, I forgot the word for "forget" when doing this sentence 8)

[GeneralXia]

護照別忘記帶 should also be accepted