Avoiding online card paying failures

[poutnikl]

What is recommended procedure to avoid unexpected failure during online card paying ?

Is there possible any general rule, catching most cases ?

Vendors often use 3rd party secure card paying providers, acting as a middleman between vendor and banking sites.
These domains are not known in advance, if it is first shopping at that vendor.

It happens often the existing ABE rules do not catch their inter-domain and inter-site linking,
and fixing ABE rules in the middle of the transaction is hazardous.

Tailoring ABE rules on live connections are often coming too late
and the transaction may fail, completely or - worse - partially.

It happened to me,for reasons above, the goods were paid, but following linking of the payment and the order failed.
It had to be fixed by vendor business operator.

[Thrawn]

What ABE rules do you have? The built-in rule shouldn't apply to this. You'd have to have some fairly restrictive ABE rules (similar to RequestPolicy) to cause trouble.

You certainly should take a careful look at the regular script-blocking whenever you're going to do something sensitive.