You can find out the standing of a user account by making a call to GetUser with that account's user ID. You can check the tags eBayGoodStanding and Status to find out if the account is in good standing. For instance, if an account is hold for non-payment, eBayGoodStanding will be false and the Status will return AccountOnHold. If the account is suspended, then the Status will return Suspended. If there are no issues and the account registration is complete, then eBayGoodStanding will be true and Status will be confirmed.