# Filing with KIPO Online KIPO's online filing system can be complex. Here are tips to make it easier. ## Before You Start - Prepare all documents in the required format - Have your applicant information ready - Check your digital certificate is valid ## Common Mistakes to Avoid 1. Wrong file format - Use PDF for most documents 2. Missing required fields - Double-check all mandatory information 3. Incorrect classification - Verify IPC/Nice classes before filing 4. Fee miscalculation - Use KIPO's fee calculator ## Pro Tips - Save drafts frequently - File during off-peak hours for faster processing - Keep confirmation receipts for your records