I will try to answer your question, as well as making some changes to the grammar of your questions themselves.
I wrote the same question yesterday. But I have not gotten (or did not get) any feedback. It makes me think that everything I wrote was absolutely incorrect.
So I will try again:
1. Could I use "line management" when I talk about the high level management of some direction (for example, vice-president of loan direction in a bank)
2. Is it correct to say: "preparing documents/evidence to file an action pursuing debt collection". My previous phrase was absoluttely incorrect I guess "Preparing calculations and documents for suing debt collection"
I suggest: preparing documents/evidence to pursue debt collecion
3. Is it possible to understand: "Responsible for a team of 14 employees receiving and putting in bank's system on-line and off-line (in written form, collected outside the bank) loan-applications".
I suggest: Responsible for a team of 14 employees that is responsible for the installing and maintaining the bank's online and offline loan application systems.
-I used the singular verb "is", because it connects to the noun singular "team". If you said "responsible for 14 employees" it would be "that are responsible for..."
-On-line and off-line are also acceptable, but the terms are more commonly seen without the hyphens
I hope you don't ignore my question this time. Thank yoy very much for your attention