[amdavidson]

NAL, Likely still illegal as you would be misrepresenting that you surrendered your passport and it is not lost nor stolen

[Scoundreller]

Iunno, if you gave it to someone and don’t know where it is, the mental gymnastics to check the “Lost” box isn’t too difficult.

But I think they usually ask you to describe the circumstances of its loss.

[lonelappde]

I'm pretty sure the government who seized your passport won't look kindly upon you pretending you forgot you aren't allowed to have one.

[gruez]

Only if you're caught. Considering that the only reason you'd even attempt this would be to escape, your only concern would be not being able to return.