ABA number
Another name for a bank's routing number — the nine-digit code assigned under the American Bankers Association (ABA) numbering system that identifies the financial institution in U.S. payment networks. "ABA number" and "routing number" refer to the same nine digits.
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What is a voided check?
A voided check is a check with the word VOID written across the front so it can never be filled in or cashed. It still shows your bank's routing number and your account number, which lets an employer or biller set up direct deposit or automatic payments without you authorizing any money to move.
How to authorize a wire transfer
To authorize a wire transfer, you instruct your bank in writing to send a specific amount to a named beneficiary, supplying their account number and a bank identifier — a routing number for a domestic wire or a SWIFT/BIC code for an international one. Because a sent wire is generally final, verify the instructions first.