rsvp zola website!

For all of you who use Zola, Do I have to put their exactly names in zola RSVP? For example:
I was checking out Zola’s RSVP system and I wrote my mother’s name down on the RSVP list and it did not allow me to write her name down. I then tried to put mom down and it let me because in my zola guest list I add my mom as “mom” instead of her real name.
It really worries me because I wrote down a lot of my guest list with nicknames because that’s how I use to Call them and it was easier for me, For example “uncle Willy” “auntie mimi” or “dick”
Do I have to fix all of them??? Or is it a passcode that they can put in to RSVP even though their names are not correct ?
I hope I explain myself