You don’t legally have to sign the back of a check to deposit it, but in almost every real-world case you should. The Uniform Commercial Code lets a bank accept and process an unendorsed check as long as you were the rightful payee when you handed it over.1Cornell Law School. UCC 4-205 Depositary Bank Holder of Unindorsed Item Bank policies are stricter than the law. Skip the signature and you’re likely to see a longer hold, an extra verification step, or the check returned to you.
What the Law Says vs. What Banks Do
Under UCC 4-205, when you deposit a check, the bank becomes a holder of that check even if you never endorsed it, provided you were the rightful payee.1Cornell Law School. UCC 4-205 Depositary Bank Holder of Unindorsed Item So the law itself doesn’t block your deposit.
Bank policy is a different story. Internal rules at most institutions require an endorsement before they’ll process a check, and they treat the UCC’s flexibility as a backstop rather than the default. In practice, that means an unendorsed check is a problem, even though it isn’t illegal.
How to Endorse a Check You’re Depositing
Your signature on the back of the check is the endorsement.2Legal Information Institute. UCC 3-204 Indorsement You have three ways to do it, and for a check you’re depositing into your own account, one of them is clearly the best.
A blank endorsement is just your signature. Once you sign this way the check is payable to whoever holds it, so anyone who finds or steals it can potentially cash it.3Legal Information Institute. UCC 3-205 Special Indorsement, Blank Indorsement, Anomalous Indorsement Don’t sign this way until you’re at the teller window or ready to hit submit on a mobile deposit.
A restrictive endorsement is the safe choice for a deposit. Write “For Deposit Only” and your account number above your signature. If a bank ignores that restriction and lets the money go somewhere else, it can be held liable.4Legal Information Institute. UCC 3-206 Restrictive Indorsement A lost check with this endorsement can’t just be walked into a check-cashing store.
A special endorsement signs the check over to someone else. You write “Pay to the order of [name]” and sign below, and that person then has to endorse it themselves.3Legal Information Institute. UCC 3-205 Special Indorsement, Blank Indorsement, Anomalous Indorsement Many banks are wary of these third-party checks because of fraud risk, so the recipient should confirm their bank will take it before you sign it over.
Sign your name the way it appears on the “Pay to the order of” line on the front. If your name is misspelled or written differently, the UCC lets you sign using the name on the check, your actual name, or both.2Legal Information Institute. UCC 3-204 Indorsement Most banks prefer both: sign the version on the check first, then your correct legal name underneath.
Mobile Deposits Need Extra Wording
If you’re depositing through your bank’s app, a plain signature often isn’t enough. Many banks require you to add “For Mobile Deposit Only” or “For Mobile Deposit at [Bank Name] Only” along with your signature. This wording exists to block duplicate deposits, where the same check gets deposited both by app and in person. If a mobile deposit gets rejected, a missing or incorrect mobile endorsement is a frequent cause. The exact language varies, so check your bank’s instructions.
Checks Made Out to More Than One Person
When a check names two payees, the word between the names controls whose signature is needed. “Pat and Chris Doe” generally requires both endorsements. “Pat or Chris Doe” can be endorsed and deposited by either one alone.5Consumer Financial Protection Bureau. Do Both My Spouse and I Have to Sign the Back of a Check Made Out to Us?
A slash or comma between names is ambiguous. Some banks read it as “and” and demand both signatures; others read it as “or.” If the punctuation is unclear, the safe move is to have every named payee sign.
What Happens If You Skip the Endorsement
Because the UCC allows an unendorsed deposit but bank policies generally don’t, a check you forgot to sign lands in a gray area. The likely outcomes:
- A longer hold on the funds while the bank does extra verification.
- The check returned to you unprocessed, sometimes with a returned-deposit fee in the range of $10 to $19 at major banks.
- A processing delay even when the bank supplies the missing endorsement itself, which the UCC permits it to do.
All three are avoidable by taking a few seconds to write “For Deposit Only,” your account number, and your signature before you deposit.
A Signed Check Can Still Fail If It’s Too Old
Endorsement isn’t the only thing that determines whether a check clears. Under the UCC, a bank isn’t obligated to honor a check presented more than six months after its date.6Legal Information Institute. UCC 4-404 Bank Not Obliged to Pay Check More Than Six Months Old The bank may still pay it, but nothing forces it to. If a check you’re holding is closing in on six months old, ask the issuer for a replacement instead of relying on the deposit going through.