Originally Posted by
797-3
My passport is now full. I don't want additional pages because they may not line up with the old pages and just make the passport bulge.
Will countries just stamp the endorsement page?
IME, consular officials do a very good job lining up the inserts with the existing pages. Obviously the passport will get thicker, though it is still manageable. The only alternative is getting a new passport long before expiration of the old one.
That will invalidate visas which are tied to the validity of the passport to which they are added. Visas which have a fixed validity periods are generally unaffected, and may be presented in the expired passport along with the current one.
An immigration official may place a stamp just about anywhere they please, but it is rare for them to do so outside the bounds of the visa/entry/exit pages.