Other questions regarding "Membership fee payment"

• Q.
  I was asked to authenticate myself when paying by credit card.
• Q.
  [Monthly course] What payment methods are supported?
• Q.
  [Monthly Course] When will my credit card payment be charged?
• Q.
  [Annual Course] What payment methods are supported?
• Q.
  Please tell me which credit cards are available.
• Q.
  Can I use debit cards, prepaid cards, and bundle cards?
• Q.
  [Annual Course] Can I change the payment method?
• Q.
  [Monthly course] Can I change the payment method?
• Q.
  [Monthly course] Do I need to make a monthly payment procedure?
• Q.
  [Monthly course] If I join in the middle of the month, will the payment be prorated?
• Q.
  [Monthly course] Is it possible to get a refund if I make duplicate payments?
• Q.
  [Monthly course] Duplicate payments occur every month.