How do restaurants charge your card for the tip if they already ran your card and gave it back to you before giving you the receipt you wrote the tip on?
In: 169
When a company runs the card, the transaction is only **posted** to ~~what is called the Automated Clearing House (a national service that handles most all transactions between US banks)~~ the credit card provider.
The ~~ACH~~ provider usually takes a few days to process, after which the debit is considered **settled**.
While it is processing, the seller can update the transaction with additional fees that are incurred on the debt that has been made (in this instance, the tip)
Edit: was wrong about the ACH handling card transactions.
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