It depends where you are going to. Sometimes, places where both of these passports have visa-free access to, would treat you differently at the point of entry depending on your nationality.
Places where it's better to show a British passport:
the EU countries, Brazil (Americans need a visa for this one), Australia, New Zealand, U.A.E., and Turkey.
Places where it's better to show an American passport:
Canada (ironic! but they take it easier on Americans)
India does not allow dual citizenship. But you can apply and get a passport-like booklet, at the nearest embassy and consulate general, that will allow you to travel to India visa-free.
If you have dual citizenship, yes you can.
Yes, you can use your dual citizenship to book a flight to the US using a foreign passport.
Yes, it is possible to hold both a Kenyan passport and a British passport. This is known as dual citizenship. Kenya allows its citizens to hold dual citizenship, provided that they comply with the requirements outlined by both countries.
Hi There Currently I hold Canadian passport however I was born in Bangladesh. Do I have to have dual citizenship or I have dual citizenship?
If you are an eligible candidate for the Dual citizenship then Yes, you can have both passports.
I don't know what New Zealand thinks about dual citizenship, but I added a link to the circumstances under which Germany allows dual citizenship.
To obtain a dual citizen passport, you typically need to apply through the country where you hold citizenship. This may involve providing documentation of your dual citizenship status, such as a second passport or proof of citizenship in both countries. Contact the relevant embassy or consulate for specific requirements and procedures.
The rules of dual citizenship are quite easy to understand. Most countries neither deny or recognizes dual citizenship. However, if you are a dual citizen you must enter the country with the country's passport you own.
Yes, dual nationality doesn't stop you from getting a British Passport.
Yes, it is possible for someone to have dual citizenship, which means they are a citizen of two countries at the same time.
you can use a Passport/Citizenship papers