Got a tourist trip to Vietnam and Cambodia coming up, so I used the slick Cambodian e-visa service to download and print my visa. Their recommendation is to staple one copy into your passport, so I dutifully did so. It's a bit awkward to get a full-size stapler in there, so I had to fumble with it ... and I ended up putting a staple through not only the page I was trying to affix it to, but also the back cover.

I fished it out and finally got the damn visa stapled to its own blank page, but my question is this: did I damage or ruin the passport's biometric chip in the process? If you open the back cover and look at the interior, the staple holes are in the far lower-right corner, inside the barcode region. Where exactly are the electronics on a US biometric passport?

It's only 18 months old -- and already has our visas in it -- so I'm praying it's not irreparably damaged. Thanks for any advice.