Train tickets changing date

when you Change the Date of your Train tickets..
Do they re send different ones out??
And once you got them what if you have to change the date agen is that possable?

Depends on who issued you the train tickets - for airline travel, you have to pay a fee, sometimes, of $100 to change the date on your tickets. I'd hold off & try to only change it once more...and, re: paper or e-etickets, I don't know, you'd have to ask them when you look into changing the ticket dates.