Buy credits for Helicon Books validator.

One credit is one book. For each package there is a specific number of retests for the same book before it is considered testing a new book.
(Note however that testing the same book without changing the modification time, will issue a warning) 

You must register to the validator before purchasing credit.

To register click here.

Prices:

Credits (books) Retests (of same book) Price ($)
5510
501090
10010100

 

paypal buy button