So you are trying to tell all of us that when you checked out, you agreed to pay the full price and be credited the $40 AFTER payment? That doesn't sound right...
Secondly, I wouldn't consider this "loose bookkeeping". How is AHS to know that the gift certificate wasn't rightfully redeemed until the true owner tries to redeem and is rejected months later?
You're not making a better case for yourself. No matter how it happened, it was still an error in your favor, and you owe the business. Afterall, you were the one who made the mistake by typing in the wrong number. AHS is only guilty of allowing an automated system to receive payments and didn't not include a fail-safe check to ensure that gift certificates are being redeemed by the owner.
You know what, honestly, I'll take your word for it that you didn't know. I'll even agree that you didn't intentionally deceive the company. But do you really think you are entitled to the extra money? If by some strange stretch of the imagination you think you won a mythical lottery prize for being the first person to discover a flaw in their system, then I give up here.
If it was me, I would have called the man at his request and clarified the situation and circumstances surrounded it. I'm sure he would have been just as reasonable as me, and would have come to the conclusion that we both benefit from maintaining a healthy customer-vendor relationship, and likely would have resulted in something favorable to both of us. I sure as hell would not have come here looking for sympathy towards your sense of self-entitlement.
PS: You seriously wish for me to potentially kill myself, and possibly multiple others in a car accident because I disagree with you? Clearly you have the moral high-ground in all of this.
