As a merchant, they charge the merchant more for credit card transactions than debit card transactions. Essentially, by using it as a credit card, they are taking an extra .5-2% from the merchant over the debit card. Feel free to keep transferring money from your local store to the big banks if you want, but as a small business owner, I'd prefer you reserve that option for Walmart and Starbucks.
Isn't that because of the additional protections offered by using the card as a credit transaction though? It's not some arbitrary additional processing charge, correct?
My check card/debit card number was recently stolen and used as a credit transaction. The bank immediately refunded the amount charged BECAUSE it was a credit transaction. I would have been subject to different rules if it was used as debit straight out of my bank account and I may not have been eligible for the immediate refund.
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