Question: How does contacting a local on Covers work

I have a long time local and we have mutual trust.  I play on a credit line.  No problem paying or getting paid.  I was originally recommended through a very good long time friend.

My question is:  I see a lot of inquiries about finding locals on here.  How does that work?  Would a local give someone that he met on the internet a substantial credit line?  Does the player have to put money up front, which presents the same problem.  Would a player front someone they do not know a substantial amount of money?  I do not see how contacting a local on the internet would possibly work, without a thorogh screening.

Am I missing something?  I appreciate anyones thoughts or explanations.

A lot of guys who are  looking for book, want a free credit line,unless you have strong reference from a long time player,you will have to pup a deposit. I have pointed some players in that direction and they had to put a deposit.Everyone is happy so far.Most of the guys looking foe a book have very few posts on the website.