CC fraud and charge backs (was: Pricing and domain delete feature

[Philippe Landau]

>In my personal opinion, OpenSRS charge back policy and total
>lack of control by the RSP on a domain name is a much more
>serious problem than their pricing policy.

We are about to start reselling domain names through OpenSRS,
but are afraid of credit card fraud and charge-backs.
Tucows, do you have numbers on this, 
by how much should we increase our price to cover these costs ?
What recommendations can be made to lower the risk ?
May domain administration passwords be held back 
until the credit card charge has been approved ?

kind regards     philippe, http://A-Z-Internet.com