To fill out a check correctly, follow these steps:

1. Write the date on the top right corner of the check. Use the current date or a post-date if applicable.
2. Write the name of the person or company you are paying on the line labeled "Pay to the order of."
3. Write the payment amount in numbers in the small box on the right side, ensuring clarity and proper formatting.
4. Write the full amount in words on the line below the payee's name. Include cents as a fraction (e.g., 45/100).
5. Sign the check on the bottom right line using the signature registered with your bank.
6. Optionally, fill out the memo line with a note about the payment purpose for your records.

Make sure to use permanent ink, avoid leaving blank spaces, and double-check all details for accuracy. This ensures the check is valid and reduces the chance of fraud or rejection.