Welcome to SaleHoo!
What do you mean exactly when you say transfer money? Are you pertaining to payment methods?
If you are, the safest payment methods would be:
- By using credit cards. Should anything wrong happen you can easily do a chargeback by contacting your credit card company.
- By using 3rd party payment services like PayPal, Google Checkout and Money Bookers. Just remember to link your account your credit card instead of your bank this way you'll have greater protection.
AVOID using wire transfer services, like Western Union - this is the easiest way to loss your money if you happen to be dealing with crooked suppliers.
Hope this helps. Cheers :)