To write a check for $30, you fill in six fields: the date, the payee name, the numeric amount (“30.00”), the written amount (“Thirty and 00/100”), the memo (optional), and your signature. The whole process takes about 30 seconds once you know where everything goes.
Fill In Each Field Step by Step
Grab your checkbook and a pen, preferably a black gel pen. Gel ink is harder to chemically wash or alter, which makes it a simple way to protect yourself from check fraud. Here is what to write in each field, moving roughly from top to bottom.
Date line (top right). Write today’s date in any standard format: 06/15/2025, June 15, 2025, or 6-15-2025 all work. Post-dating a check (writing a future date) does not guarantee a bank will wait to cash it, so use the actual date unless you have a specific arrangement with the recipient.
Pay to the Order Of (payee line). Write the full name of the person or company you are paying. If it is a business, use the official name that appears on your bill or invoice. Avoid vague entries like “Cash,” which allow anyone holding the check to deposit it.
Dollar box (the small box with a “$” symbol). Write 30.00 in the box. Start the numbers as far left as possible so no one can squeeze extra digits in front. Including the “.00” makes it clear there are no cents involved.
Written amount line (below the payee line). Write: Thirty and 00/100. The fraction 00/100 represents zero cents. You can also write “no/100” or “xx/100” to mean the same thing. After the fraction, draw a horizontal line all the way to the word “Dollars” printed at the end of the line. That line fills the empty space so no one can add extra words to inflate the amount.
Memo line (bottom left). This field is optional but useful. Write a short note like “June rent,” “birthday gift,” or an account number. It helps both you and the recipient remember what the payment was for.
Signature line (bottom right). Sign your name exactly the way you signed when you opened the bank account. A check without a signature is invalid and will be rejected by the bank.
How to Write the Amount With Cents
If you need to write a check for $30 and some cents, the process is almost identical. In the dollar box, write the full number with the cents after a decimal point, such as 30.49. On the written amount line, write Thirty and 49/100, then draw a line through the remaining space. The cents are always expressed as a fraction over 100, not spelled out in words.
Why the Written Amount Matters Most
If the number in the dollar box and the words on the written amount line ever disagree, the bank goes with the words. That is the legal rule in every state: words override numbers, and handwritten terms override anything printed or typed. This is exactly why it is important to spell out the amount carefully. A slip on the written line carries more weight than a typo in the box.
Keeping Your Check Secure
Beyond using a gel pen, a few small habits reduce the chance your check gets altered or misused. Never sign a blank check. Fill in the payee and amount before you sign. When you write in the dollar box, press the numbers close to the dollar sign so there is no room to add a digit in front of your “30.00.” On the written line, starting your words at the far left and drawing a line through any unused space closes the door on tampering.
Record every check you write in your check register or banking app. Note the check number, date, payee, and amount. This makes it easy to spot unauthorized transactions and keeps your running balance accurate. Most banks also let you view images of cashed checks through online banking, so you can verify that the amount processed matches what you wrote.