单币种借记卡认证通过却无法用于支付？

熊一样de存在

如题。在认证通过以前还成功在namesilo购买了域名，认证通过以后反而不能在hostmonster购买空间了。

到付款时，页面上方提示“要完成此付款，请在您的PayPal账户中添加一张借记卡或信用卡。如果交易金额未超过您的PayPal账户余额，不会对您的卡扣款。”

下方的框框里已经说了“您的账户中具有1张有效卡银联（XXXX-6505）银联（XXXX-6505）。”……
为什么还要添加？

熊一样de存在

问HostMonster的客服了。是他家的问题。
对话实录如下，欢迎纠正语法错误……
Nicole: [5:05:28 AM] Hi. I'm Nicole. I'd be happy to help you. Please be aware that I am speaking to several people at once so there may be a lag between responses. After we are done speaking, please feel free to take a quick survey.
[5:05:30 AM] hi
FIRST TIME SALE..: [5:06:11 AM] I'm sorry that my English is poor and I can't type quickly.
Nicole: [5:06:18 AM] its okay.
[5:06:24 AM] how can I help you?
FIRST TIME SALE..: [5:06:42 AM] I'm from China.I want to buy your hosting service.
Nicole: [5:06:55 AM] okay great.
[5:07:05 AM] you can go to hostmonster.com > get started button
FIRST TIME SALE..: [5:07:05 AM] I want to use Paypal with my Unionpay Card
Nicole: [5:07:19 AM] then enter the domain y ou want in the " I need a domain" form
[5:07:34 AM] enter the customer and payment information on the next page.
FIRST TIME SALE..: [5:07:35 AM] I have a domain already.
Nicole: [5:08:58 AM] then you'd use the " I have a domain" form.
FIRST TIME SALE..: [5:09:03 AM] Anyhow I can't pay with my Unionpay card.
Nicole: [5:09:04 AM] really only those two options possible.
[5:09:07 AM] you can't.
[5:09:27 AM] you'd need to pay with a credit card such as visa, mastercard, discover or american express.
FIRST TIME SALE..: [5:09:56 AM] Why not Paypal？
Nicole: [5:10:31 AM] you can pay with paypal as long as the paypal account is backed by a credit card.
FIRST TIME SALE..: [5:10:37 AM] I don't have any credit card so I have to choose Paypal.
Nicole: [5:10:59 AM] you'd need a paypal account backed by a credit card only.
FIRST TIME SALE..: [5:11:33 AM] My paypal is backed by a debit card.Can't I use it?
[5:12:19 AM] It is more convenient to use debit card for me.
[5:13:21 AM] can you help me?
Nicole: [5:13:43 AM] sorry it must be backed by credit. sorry.
FIRST TIME SALE..: [5:14:37 AM] What a pity.Any other way?I don't have even one credit.
Nicole: [5:16:21 AM] sorry no.
[5:16:23 AM] thats it.
[5:16:33 AM] I would let you know if it were otherwise.
FIRST TIME SALE..: [5:17:10 AM] Okay.Thank you.Have a nice day.

PayPal专业顾问

呵呵，一般跨境支付的话，最好选择双币的信用卡或者借记卡，才能支持外币的支付。  对方网站在集成paypal  的时候会进行一些设置来识别付款的来源是何种的卡别。，有什么问题欢迎咨询我！