What does "informal application letter" mean? For an application to a Master programme, I am asked to send:


a description of my study motivation on 2 pages
an informal application letter


What does "informal application letter" mean? Is it something commonly asked for an application? I really don't understand what they want.
I would interpret that as asking for a short letter that briefly states what you are applying for, your educational background, interests and goals, why you are interested in their   program specifically, and mentions anything else you'd like them to consider.