You will get a few proposals, and finally logo in formats: AI, EPS(Business cards, Brochures,Advertisements etc), JPG, PNG, GIF (Websites, Online Ads and Banners, Email marketing and signatures), TIFF (Standard printing for common use (ie. invoices, letterheads, etc.)), Full Color(CMYK file for the printed file formats (EPS, TIFF) and RGB for the web formats (JPG, GIF). This way they don’t experience strange color issues when printing and will save them money with their printers.), Black and Reversed Logos(A well designed logo should not only work in color but also in black and white (reversed-out) versions.)