Light long-sleeved shirt, patterned tie, dark suit jacket…
And khaki cargo shorts and zoriis.
Hey, passport photos only show from the waist up! 
Why did you need to get even that dressed up for a passport photo in the first place?
One must maintain an official sense of decorum.
I thought this was going to be about telecomuting.
(did I spell that correctly?)
That goes without saying! 
I did get some smiles from the people standing in line at the mailbox place where I had the picture taken – once they knew I was there for a passport photo, and not just strangely dressed.
I think I’m wearing a t-shirt in my passport photo. Not that you can tell - at most, you see the very top. But when the photo was taken, I was wearing my hair long. Now it’s short again. And my glasses are different. Close enough, I guess…
It would never occur to me to dress up for a passport photo. I would just go in whatever I was wearing that day.
I once had a coworker that did not wear any pants for a significant portion of a day. He just sat behind his desk.
If you don’t stand up, it works. Mostly.
Proof of the downfall of Western Civilization. The next thing you know, people will be wearing sweat pants and flip flops on air flights.
I wasn’t wearing pants once. The doctor was so mad he smacked my butt and then told my mom “It’s a baby girl!”