I read some of the topics but I could not find an exact answer. Actually , i have already used for depositing my BTC-E account once.
But , i want to learn whether it is irreversible or not since you can deposit your Liqpay account via credit card.
From what I understand, a consumer paying with LiqPay cannot reverse the transaction. Of course, if you pay using a credit card you can file a dispute and let your credit card issuer battle it out with LiqPay -- you may or may not get your funds back. If the transaction required confirmation through SMS and your mobile happened to provide confirmation, you'll probably lose the "it wasn't an authorized payment" argument.
But I believe that the merchant that accepts LiqPay is exposed to the chance of a reversal when the transactions were fraudulent. (and account frozen if fraud happens more often than it should).