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Comment on Ask HN: Advice on strictness of credit card validation

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Yes to CVv.

Only use AVS if your shipping.

Authorize only for 1.00 to verify card for subscription billing or authorize the card for full amount if you are batch end of day processing. The authorization holds the money for a period so you can capture it and if you never do it releases it back. It only affects a cards available credit and does not affect you or the consumer unless you capture it.

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