Our design team thoroughly check any designs that you submit via contacting us or File Upload to identify any issues. Provided files for custom manufacturing might include properly centering logos/graphics that might be slightly off, combining color variations, ensuring that any graphics used have a high enough resolution, etc. We will always send you final mockups & a detailed document for your final approval before proceeding to production. And we go a step further; during the different production steps, we will keep you posted by sending you pictures to have them corrected right away!