The concerned person, a Dutch citizen, is going on a bus tour in former Yugoslavia, travelling Germany-Austria-Slovenia-Croatia-Bosnia-Montenegro-Albania-Macedonia-Kosovo. They only hold a passport and not a national ID card.
By law, Bosnia, Kosovo and Montenegro are to stamp Dutch passports on entry and exit. Thus, at the Bosnian-Montenegrin border, the person should get both stamps, at the Montenegrin-Albanian border a Montenegrin exit stamp, and at the Macedonian-Kosovan border a Kosovan entry stamp.
In your experiences, is laziness/a lax attitude about stamping EU passports at these particular borders common? I know it's a common issue at the Croatian-Bosnian land border, and we're trying to establish whether the person should verbally ask the officers to issue one whenever they collect the passports from the bus passengers.