Theoretically no, because Northern Ireland and Scotland are both part of the United Kingdom. However, because of increased security in recent years, you cannot board an aircraft without acceptable ID. The most acceptable form of ID is a valid passport. Some airlines will accept an identity card issued by certain European countries. To be absolutely certain, you should contact whichever airline you are travelling with.
if scotland is a state of singapore u dnt need the visa but if its not u will need it
Yes, Scotland is out side of the U.S.
Do u need a passport from scotland via dunegal going by ferry
No.
NO
this question doesn't make sense as Scotland is in the UK. If you mean "do you need a passport to travel between England and Scotland" then the answer is no. Unless you are flying, in which case you will need some form of photo ID such as a passport or driving license.
no
Money
I am sending a letter to Crookston in Glasgow Scotland. Is there a province that I need to list?
Of course. You will need a valid passport.
Much the same as people need anywhere else.
yes