I currently work overseas and do a fair amount of traveling. I've filled 38 pages of my 48 page passport in the last 16 months. I plan on traveling / working overseas for another year and will need additional pages for visas. I've checked the government's website but can't figure out if I can hold two (2) passports at once? I could get a letter from my company stating that I require it if it helps (I've heard this works in the UK). Does anyone have any experience with this?