We would prefer to have all graphics in vectorized .eps, .ai, or .pdf files. For some applications we can use .tiffs, eps, or psd files. We do not accept Microsoft Office documents as acceptable formats for artwork. We CAN utilize them as an example for what you would like for your project, but again, can NOT use them as acceptable file formats. This includes Excel, Word, and Powerpoint. If you have questions regarding your logo files, then please feel free to contact us and we will get your situated.