You can safely provide adult verification through a free credit card process.
Your credit card will be TEMPORARILY CHARGED a nominal $1.00 charge through your individual bank, processed by the credit card gateway and then credited back to your account. The $1.00 charge will be processed immediately, but the credit may not appear on your statement until the NEXT BILLING CYCLE. This is necessary in order to be sure that your credit card is being presented by the legal card holder.
All information is secure and your credit card number will not be retained or used for any other purpose.
NOTE: Some banking institutions will not allow an online $1.00 transaction. If you experience difficulties, please choose another verification method. If that doesn’t work, then contact the customer support team. firstname.lastname@example.org