When you complete a mobile check deposit, your banking app runs optical character recognition across the bottom line of the check. It reads the magnetic ink character recognition (MICR) line to identify the routing transit number, account number, and check serial sequence. That image joins an electronic batch file transmitted across clearing house interbank payments channels, primarily operated by the Federal Reserve Bank’s FedACH or The Clearing House.
Settlement requires bilateral communication. Your bank (the bank of first deposit) sends the digital transit item to the paying bank (the drawee). The drawee bank must review its ledger, run an internal check verification service, and verify whether the issuer possesses sufficient funds to cover the draft. If the payer's account has inadequate liquidity, the drawee flags a non-sufficient funds risk and bounces the draft back along the transmission rail.
This return cycle takes time. While sending the check image happens within hours, receiving an automated dishonor notice often takes forty-eight to seventy-two hours. Banks build deposit holds directly around that operational lag to prevent customers from withdrawing money that may evaporate two days later.
