The basic concept is pretty simple:
– The client orders your service and pays immediately. The money is withheld by Fiverr.
– You work and deliver your order.
– The client is satisfied with your work, in which case he/she will either:
a) Mark your order as completed and optionally rate your services.
b) Do nothing. 3 days later the order is marked as completed.
– Two weeks after the order is marked as completed, Fiverr will give you the money.
Things that can go ‘wrong’ include the client NOT accepting your delivery and asking for a revision (in which case you would normally re-deliver, and the process would continue normally as stated above), or asking for a cancellation before you get to deliver your order, which you can either accept or reject, and any dispute that could end up with the client getting a refund would require the involvement of Fiverr’s Customer Service.
There are a number of nuances in between, but this is basically what it’s all about.