You can of course choose to sign up to any Forex Brokers you like, however you are certainly going to be putting yourself at all levels of risk if you do not carefully select the one that you sign up to and trade at, so keep that in mind.
What you will find is that not every Forex Broker has taken the time and effort to get their Brokerages licensed and many of them are not even regulated too, which means they are free to do what they please which could of course mean rip their customers off.
The best type of Forex Brokers you can sign up to and trade at are always going to be those that have indeed taken the time, effort and also have paid the often excessive financial cost to go through the vetting procedure to become licensed and regulated which can be very time consuming too.
For by joining such sites you are then going to be afforded a lot of protection, including but not limited to having the peace of mind in knowing your deposits and trading funds are safe and will always have the peace of mind also in knowing those sites operate fairly and to the highest of industry standards too.
Minimum Age Requirements
It will all be down to the regulatory authority that has licensed a Forex Brokers and often coupled with the country in which you live and reside as to whether there are going to be any minimum age requirements in place at a Forex Broker site.
What you will find however that all licensed and regulated Forex Brokering sites are going to have in place some form of minimum age requirements on their sites and apps if they are licensed by one of the much more respected licensing authorities.
Know Your Customer Requirements
If you do not have any form of identification available of you to prove your name, age and address then I would advise you not to attempt to sign up to any Forex Brokers as they will be required to ask you for copies of those documents at some point in time.
In fact, what I would also urge you to do it to contact the Forex Brokers customer care and support teams to ask them what if any documents they may require from you, as sometimes they are able to verify your account, age, identity and address electronically!