8 
Mexico (but an identification card, issued 
by a Mexican consul, must be obtained), 
Netherlands, Nicaragua, Norway, Pan¬ 
ama (Americans entering Panama as 
transients, maximum limit of sojourn 
being six months, need no visas; those ex¬ 
pecting to remain more than six months 
should consult the nearest Panamanian 
consul for detailed information as to im- 
\ - ; ' 
migration restrictions), Paraguay, Peru 
(no visa required of tourists, but a visa 
required of other travelers), Siam, St. 
Pierre-Miquelon, Sweden, Switzerland, 
__ « 
or Uruguay. 
19. Visas are not necessary for Danzig, 
as has been stated above. However, a 
person desiring to enter or leave Danzig 
by rail should be in possession of a Polish 
or 'German visa, or both. 
20. An American citizen leaving the 
United States for a country where pass¬ 
ports are not required is nevertheless ad¬ 
vised to carry a passport, except in travel 
to Canada or Mexico. The passport may 
later save the time and inconvenience of 
applying for one abroad should the 
holder desire to travel in countries where 
passports are required. It will also en¬ 
able the holder to establish his American 
citizenship upon his return to the United 
States and thus facilitate his entry. 
9 
American citizens who leave the United 
States without passports should carry 
with them proof of their citizenship, such 
as birth, baptism, or naturalization cer¬ 
tificates. 
21. Registration at American consu¬ 
late. —American citizens intending to 
make an extended sojourn in a foreign 
country should register in the nearest 
American consulate immediately upon 
arrival in the foreign country. 
22. Registration with local authori¬ 
ties. —Information in regard to local po¬ 
lice registration, etc., in foreign countries 
should be obtained from the local author¬ 
ities direct or through the nearest Ameri¬ 
can consulate. 
23. Dual nationality. —Persons born in 
the United States of unnaturalized par¬ 
ents are American citizens under Ameri¬ 
can law, but they may also be citizens or 
subjects of the country of their parents’ 
origin under the law of that country. As 
the legal right of the other country to the 
allegiance of such persons while within 
their territory cannot be denied by this 
Government, the Department can offer no 
assurances to them that any representa¬ 
tions which it may make on their behalf 
will be successful. 
