总结了一下使用paypal在godaddy购买域名的几点注意事项。

1、
第一次通过paypal在godaddy付款的时候，有如下的支付协议：

By electing to use your PayPal account to make a purchase through GoDaddy.com, Inc you are agreeing to the Merchant-Initiated Payment billing agreement through PayPal. This billing agreement establishes a relationship between you and GoDaddy.com through PayPal and allows you to authorize GoDaddy.com, Inc to withdraw funds for payment of purchases you make at our site directly from your PayPal account.
You will receive an email notification from PayPal informing you of the acceptance of this Merchant-Initiated Payment agreement and your monthly billing limit. Your monthly billing limit is based on the amount of your initial purchase using the account with us. We start at $500.00USD and round up your limit to the nearest $100.00USD. You are free to increase or lower your monthly billing limit, if you choose to, by visiting www.PayPal.com
Limit for this Merchant-Initated Payment: $500.00USD per month
Have questions about this monthly limit? Read More

大意如下：
当你在GoDaddy.com选择使用paypal付款的时候，说明你同意了PayPal的Merchant-Initiated Payment billing agreement。同意这项协议说明你允许Godaddy.com从你的PayPay账户直接扣款来支付你在GoDaddy购物之消费。

你会收到一封邮件，这封邮件会提醒你已经同意了 Merchant-Initiated Payment agreement 及你每月的消费限额。你每月的消费限额是基于你第一次使用PayPal账户购物时的消费金额。默认的每月限额为500美元，我们将您的限额调整为100美元左右。您也可以自行调整。请访问：www.PayPal.com

从google到的资料来看，认证后paypal没有消费限额，如下：

发送付款时不受 PayPal 限制
在您第一次附加信用卡时，PayPal 可能会规定消费限额。如果您想在使用信用卡发送付款时不受 PayPal 限制（但仍将受到信用卡公司规定的最大信用限额的限制），那么您需要完成 PayPal 的扩展使用登记。

来源：http://www.paypal-china.com/credit-card.htm

但是在我的paypal账户里也没有找到设置消费限额的功能，最好给信用卡设置一下消费限额。

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2、
第一次使用paypal付款的时候，godaddy会保存paypal的信息，提示输入“PayPal account friendly identifier”。当我们输入这个所谓的“PayPal account friendly identifier”后，那么下次付款的时候付款选项里就会多出一个付款选项，通过这个选项就不需要前往paypal付款页面而直接付款了。

以下摘自http://www.dnforum.com：

Or If you have ERROR : Enter PayPal account friendly identifier, then just before you press “submit”, right on top, there is a blank where you need to write a name for this paypal account ID(or you can create new ID) so that next time when you want to use the same paypal account you won’t have to go through the whole process again (going to paypal and agreeing to terms from godaddy.com etc…) I think the paypal account friendly identifier is a name for the future so that you can identify that account.

As for credit card, you will need to enter it into your paypal account. Paypal has options that says it will debit from the paypal balance first, then whatever you have inputed in there, (bank account, credit card etc…) it will debit from there if your paypal balance is short. If you don’t have a credit card or don’t want to use one, you can use your bank debit card too.
Go to source web page: How can I pay GoDaddy with Paypal option payment? – DNForum – Domain Sales, Domain Forum, Domain Appraisals, Domain Registrars

原文链接：http://www.dnforum.com/…171646.html

大意如下：
当单击“submit”按钮但是遇到“Enter PayPal account friendly identifier”错误的时候，看一下“submit”按钮的右上方，那里有一个输入框需要我们给当前正在使用的的PayPal账户起个“friendly identifier”，那么下次如果我们使用相同的PayPal账户付款，就不需要把所有的流程再重新走一遍（见下图）：前往PayPal付款页面、点击同意协议等等。这个“paypal account friendly identifier”的作用就是简化付款的流程。

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3、
因为之前提交的注册信息不合标准，每次注册新域名的时候都会有如下错误：

Click here to correct the following Registrant Information.
ERROR: Too many characters in Address 1 Field

Click here to correct the following Technical Information.
ERROR: Too many characters in Address 1 Field

Click here to correct the following Administrative Information.
ERROR: Too many characters in Address 1 Field

Click here to correct the following Billing Information.
ERROR: Too many characters in Address 1 Field

好麻烦，现在还不知道在哪里统一修改，待解决。

godaddy会不定时（大概一年一次）的发邮件通知修改账户的登记信息，收到邮件后就可以去修改了。