Refund question

Hi I have a very simple question. Say for example I sold couple of products on clickbank, they send me a check and couple of days afterwards the buyer files a refund claim. My question is, where does clickbank get the refund money from? Do they charge me or is there something else involved.

Thank you.

 

Clickbank takes your share of the purchase out of your clickbank account

 

Clickbank takes it from your account.

 

ok... What if my balance is zero after they sent me the check?

 

They always hold back an "allowance" from your commissions to cover refunds.