anyone can give me details on how online dumps checker works.
if it was tested (checked) for 1$ for example to see if live ( approved) what happen?
it is tested on a pos? virtual pos?
the 1$ transaction will be shown on original card holder's transaction's card page?
can someone explain please?
Добавлено через 1 час 11 минут 6 секунд
can someone help me with detailed explanation please.
i need to get some knowledge.

Good question.
From what I understand, no, the transaction will be processed as pending and card holder will not see it. However, merches may be using the same servers to process the transaction, in this case you may end up with having multiple cards been checked from the same non-diversified source. Banks see that and react by banning the cards. To a very certain extent, it depends a lot on your luck.
Never heard of POS checkers
</br></br></br></br>

This website http://null4a.net/
https://s15.postimg.cc/yl47xk5vf/Untitled.png
</br></br>

i want a checker to check at any amount even 100$

there is the luxury site. dig around crdclub (cLUB2cRD) and you will find their link. You have to be a member and they charge $1 per transaction/CHECKER/TESTER. You also have to have jabber to be a member!! Tricky to setup Jabber. Search and you will find. Apparently they LUXURY (something something) have a system that will not get your card banned! dISCLAIMER: I DO NOT WORK FOR THEM NOR AN AFFILIATE NOR DO I PROMOTE THEIR SITE NOR APPROVE OF FRAUD!!

tricky to setup jabber lol what a comic

jabber.at - Registration deactivated
Registration is currently deactivated. Please see the start page if there is any more information.
jabber.at/account/register/
ANSWER TO MY COMMENT. Due to new EU laws. Where is this COMICAL?
</br></br></br>

checking a card with $100 amount will certainly kill the card

Is using a checker just to see if the card is still valid or to see the amount available on it.. ?

The Checker works like this, User interface--&gt; Merchant --&gt; Back to user Interface. What that means that all these checkers are using merchants to do small transactions, they find a merchant that needs only front of the card and Expiry which can be found in the track. The on hold transactions are called a Pre-Authorization and no, the card holder can still see them in the online banking, once the money is returned the transaction goes away from online banking. Hope this helps, Cheers !!!