Hi,

I think this has been discussed in some other threads. Yes, blank visa pages can be added at US consulates. For example, the US Embassy website in Singapore states the following:

"Visa pages can be added to a US passport by bringing the passport to the American Citizen Services (ACS) section of the US Embassy in Singapore during our public hours, which are Monday through Friday, 8:30 am to 12:00am and 2:00pm to 3:30pm, excluding local and American holidays. The process usually takes less than one hour and is free of charge.

There is no legal limit to the number of times pages may be added. If your passport has become so thick it is hard to use, we recommend that you apply to get a replacement."

No idea about stamping Visa's on those last pages marked for endorsements.

Steve