No problem - you have a paper trail showing where you got it, that you were unaware of what was in it, and that you were not allowed to inspect it.
Anecdotally, I once had an outrageously difficult time explaining to a German customs officer that the bag I placed in the scanner had items belonging to both my sister and myself. It didn't help that we were travelling together, and she was also there to back my statements up. He simply would not accept the fact that there was an electronic device (e-book) that belonged to her, in a bag that belonged to me, which we forgot to take out before the scanner.
And can do so by adding !g to a Kagi query, just like on DDG.
You know, I once ordered takeout from the other side of the country because I had too much privacy on my search engine...