Good read and good reference to get an idea about it all.
Taking Payment with PayPal, Escrow and other Online Options in Making Money
These days a lot of freelance work is happening online, often internationally and often without you and your client ever meeting. Thanks to the web we now have access to a much larger client pool which is great news, however it does present a whole raft of new problems in terms of payment options and trust. Laws about payment, fees and facilities for transactions and legal fallbacks for chasing payment all differ around the world.