Yes, an eCheck will still work without MICR ink. Even though the codeline is printed in regular printer toner, your bank is still able to capture an image of the check and send it to the automated clearing house to request funds from the issuing account.
Are you sure eChecks will be cashed?
Last year, we had over 5 billion dollars and a 99.9% acceptance rate in eCheck transactions go through banks all across the country.
Will I be able to deposit these checks without MICR ink?
Even before eChecks, checks were being deposited without proof of a MICR codeline.
If you'd like a comprehensive view on the legalities, visit our Security & Legal section. In the meantime, we'll answer as simply as we can. Many banks use remote deposit capture (RDC) technology allowed by Check 21 regulations. This is allows you to deposit a check with your bank using your smartphone by taking a picture of it. The bank uses the image of that check to receive funds from the senders' bank. When taking a picture, there's certainly no way to tell if the check was printed with magnetic ink. Before eChecks, most banks were accepting checks for deposit without any proof of a MICR codeline.
Additionally, many banks now eliminate a lot of work by using optical character recognition (OCR) instead of bothering to scan the magnetic ink (MICR). With the rise of check imaging, having magnetic ink printed in the codeline of a check is no longer a requirement.