When a post void is done, a refund is not put through to your account.

When you do a credit card transaction, the system electronically places an authorization which guarantees your funds for the merchant. The merchant then has to close out the transaction and actually charge your card for the charges to post. Usually this happens overnight, after the close of the business day when the systems reset.

When a post void is done, the transaction is essentially cleared out of Target's system as if it never happened, but this does not affect the system of your financial institution. Once an authorization is placed, it either must be posted as a charge, or left to expire. Depending upon your financial institutions policies, as mentioned, it can take 7-10 business days.

Your money will NOT appear as a credit, the pending charges will simply disappear.