You do not strictly have to sign a check to deposit it, but you almost always should. Under the Uniform Commercial Code, your bank is allowed to process an unendorsed check from its own customer, yet nothing forces it to. Many banks will kick the check back and ask for your signature, and mobile deposit apps typically require specific endorsement language before they will accept the image. The safe answer to whether you have to sign a check to deposit it is yes, in practice, every time.
What the Law Says About Unsigned Checks
The UCC lets your bank treat itself as the rightful holder of a check the moment you deliver it for deposit, as long as you were the named payee when you handed it over.1Cornell Law School. Uniform Commercial Code 4-205 – Depositary Bank Holder of Unindorsed Item The bank can add a notation that the item was deposited by you or credited to your account, and that notation legally stands in for your signature.
That is permission, not obligation. Banks routinely return unendorsed checks and ask you to sign before resubmitting. Some checks also carry printed language like “payee’s endorsement required,” which blocks the bank from supplying the missing signature on your behalf. Assume you need to sign, and treat the UCC rule as a backstop rather than a workaround.
How to Endorse a Check
There are three main ways to sign the back of a check, and each carries a different level of security. The right choice depends on how you plan to deposit it and how worried you are about the check falling into someone else’s hands.
Blank Endorsement
A blank endorsement is just your signature on the back, nothing more. Once you sign this way, whoever holds the check can cash or deposit it, which effectively turns it into cash.2Cornell Law School. Uniform Commercial Code 3-204 – Indorsement Wait until you are at the bank or ATM before signing this way. If you lose the check after a blank endorsement, the finder can negotiate it.
Restrictive Endorsement
A restrictive endorsement limits what the check can be used for. The common version is “For Deposit Only” written above your signature, followed by your account number.3Cornell Law School. Uniform Commercial Code 3-206 – Restrictive Indorsement That tells the bank the check can only go into your specific account. No counter cash-out, no rerouting into someone else’s account. Use this when you are mailing a check or handing it off for someone else to deposit for you.
Special Endorsement
A special endorsement transfers the check to someone else. You write “Pay to the order of [person’s name]” and sign below. The check becomes payable only to that named person, who then has to endorse it themselves.4Cornell Law School. Uniform Commercial Code 3-205 – Special Indorsement; Blank Indorsement; Anomalous Indorsement One caution: many banks treat specially endorsed checks as third-party checks and either place longer holds on the funds or refuse them outright. Confirm with the receiving bank first.
Endorsing for Mobile Deposit
No federal rule dictates a specific phrase for mobile deposit, but most banks require you to write “For Mobile Deposit Only” beneath your signature, and some add “at [bank name].” Banks impose this through their account agreements to keep the same check from being deposited twice at different institutions. Skip the phrase and the app may reject the image, or the bank may reverse the deposit after the fact.
Mobile deposits also carry daily and monthly dollar limits that vary by bank and account type. Basic accounts may cap at a few thousand dollars per day; premium accounts can run to $25,000 or more per day. A check over the limit has to go to a branch or ATM.
What If Your Name Is Misspelled
If the check shows your name wrong — a misspelling, a nickname, a former name — you can endorse using the name printed on the check, your correct legal name, or both. The bank taking the check is allowed to require you to sign both versions.2Cornell Law School. Uniform Commercial Code 3-204 – Indorsement Sign the misspelled version first, then your correct name directly below. That covers both possibilities and keeps the deposit moving.
Checks Made Out to More Than One Person
When a check names more than one payee, the connecting word decides how many signatures you need. Names joined by “and” require every listed person to endorse. Names joined by “or” mean any one payee can endorse and deposit the check alone.5Cornell Law School. Uniform Commercial Code 3-110 – Identification of Person to Whom Instrument Is Payable
If the names appear with no connecting word at all, such as “John Smith Jane Smith,” the treatment varies. Some banks read it as “or” and take a single signature; others insist on all parties. Call your bank before you try to deposit a check like this.
Checks Made Payable to “Cash”
A check written to “Cash” instead of a named person is a bearer instrument. Whoever holds it can deposit or cash it without a specific payee’s endorsement.6Cornell Law School. Uniform Commercial Code 3-109 – Payable to Bearer or to Order The risk matches actual cash: if you lose it, the finder can negotiate it. Most banks will still ask you to sign the back and show identification before processing.
Endorsing a Check for a Child
Children generally cannot open accounts or endorse checks themselves. When a check is made out to a minor, a parent or legal guardian typically endorses on the child’s behalf. The usual format is to print the child’s name on the back, write “minor” next to it, then print and sign your own name with your relationship (such as “parent” or “guardian”). The check then goes into a custodial account or your own account. Policies vary, so ask your bank for their exact format before you sign.
Old Checks You Have Not Cashed Yet
A signature on the back will not save a check that has aged out. A bank is not required to honor a check presented more than six months after its written date.7Cornell Law School. Uniform Commercial Code 4-404 – Bank Not Obliged to Pay Check More Than Six Months Old The bank may still choose to pay it in good faith, but do not count on it. Contact the issuer and ask for a replacement rather than gambling on a stale check going through.