We had same exerience as Ralph just last month. I sent 2 checks in 2 FedEx envelopes and did not pay for or explain extra pages, just checked the box. I think the need to explain was only if you had not previously requested extra pages but I dont know where I saw that. I added the extra $ for expedited return and got both our new passports back in about 2 weeks with the extra pages. The old ones came back regular mail about a week after that.
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Helen
