If there are errors in personal data in your train ticket, there are three possible solutions:

1. If there is not more than one incorrect letter in the name and one incorrect number in the passport number in the ticket, you do not need to do anything.

 

You will be quietly admitted with this ticket to the train. Errors are allowed in the date of birth. But there is an exception, if an error affects the cost of the ticket, for example, it is paid as for a kid and after correction it should become for "adult".

2. If there are more mistakes (for example, you have mistaken the patronymic), then you will have to reissue the ticket. This can be done in two ways:
A) In advance, apply   to the ticket office of JSC Russian Railways personally with your passport and an order number or a boarding coupon. You will be given a new ticket. The cost of the service will be 223.7 rubles. Under the rules, the personal data can be changed only in the ticket issued by JSC "FPK", but there are cases when the ticket office corrected the data in the tickets of other carriers. Check it with the ticket office.
B) Contact staff in your train before departure. Your personal data will be changed at a special terminal in the staff car and a new ticket will be issued. In this case it will be necessary to pay a fee of 200 rubles to the conductor.

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3. If there are so many mistakes that the passenger can not be identified, the ticket can only be returned online or at the ticket office. If there are more than two errors in the ticket, it is better to go to the ticket office, as the way to restore the ticket (reissue or refund) is mostly dependent on the particular cashier.

Find more about Russian Railways and travelling by train across Russia...
 

Sources: https://www.tutu.ru