Following are some of the FAQs on Passport-Services.org generally asked for US Passport:-
Can I use black and white photos for my passport?No. The photos must be in color. The photos must be 2 x 2 (5 cm x 5 cm) with a white or very light colored background. Blue backgrounds are not acceptable. Be careful with the size -- passport photos you get at a local Japanese photographer's shop are usually too small and are intended for a Japanese passport.
Can I apply by mail even if my current passport already expired?
Yes, if the expired passport was issued within the last 15 years. You must still submit the passport, even if it has already expired, and meet all of the other standard passport renewal criteria.
When I download a passport application, can I use A4-size paper? I can't get 8.5 x 11 paper in Japan.
You can use A4 paper. The forms you print must be clear and sharp, printed in black on white paper, with no holes or perforations, at least medium (such as used in most photocopiers) paper weight, and with a matte surface. Thermal paper, dye-sublimation paper, special inkjet paper, and other shiny papers are not acceptable.
Should I staple one of the two photos needed for a passport to the application form?
No, don't staple them. Just write the applicant's name on the back of the photos with a felt tip pen (ball point can press through and mar the picture) and include them with the application.
On the passport application form it asks for a permanent address. I live in Japan now, but may move back to the U.S. someday. What should I write?
It is up to you. If you reside in Japan, you can write your Japanese street address. Even if they live in Japan, some people prefer to write a U.S. address, such as their parents' home or company headquarters.
I applied for passport in the U.S. but came to Japan before receiving the passport. Where can I call to ask about its status?
The Embassy does not have information on passport applications in-process in the U.S. Please call the National Passport Information Center at 1-877-487-2778, a toll-free call. You can also.
Hence if you have any question then you can visit such websites who deals in such services. Passport-Services.org always try to update the recent FAQs on Passport services.