Showing these documents would simply be proof of identity. To become a guarantor you would have to sign a document whereby you formally guarantee the obligations of the other party. The bank would send the papers to you and ask you to take independent legal advice on the matter. Happy to discuss further if you have more information. In the meantime I hope that helps. Please leave a positive rating so that I am credited for my time.
Thanks for replying. Dot seems that your for ends have taken advantage of your friendship by telling their lawyer something that wasn't true, presumably so that they could say they had access to your money for their own transaction. However, even that being the case, you would have to sign a guarantee to become a guarantor. You haven't done that so you can't be held liable for anything. However, don't help them like this again. I can understand why you were worried and hope that this post gives you some comfort.
Sorry, second sentnce should start, "It seems that your friends...."