I mean once the logo is already approved, what is the most professional way to send them the logo — and what formats do you include?
Here are few things you need to do for delivering your final file:
1- Make Sure you are sending these vector files: EPS (Encapsulated Post Script) AI (Adobe Illustrator File) PSD (Photoshop)
2- Make sure your provide: Font Link if you are using the free fonts in separate readme file Copyright document saying that you have transferred all the rights. Different logo versions (Black, White) Favicon or Icon if possible.
3- Extras: Provide 3D Mockup Preview for social profiles Provide Layered version (Fonts + Graphics)
What seems the most professional way to do it, from my experience, is to present the following:
actual logo in editable format (ai or eps, preferable) - include a version of the icon separated from text if applicable
logo in non editable format (png is the best choice, as size doesn't matter). I would provide both light and dark versions of the logo (you do have them right?) in both clear and opaque background. Why? Because not all customers have Illustrator installed on their machine and they just need a logo for their email footer or something
a guide on logo usage in pdf format. Please include following info:
- color swatches for main logo colors (and backgrounds if applicable)
- positioning guides (minimum margin, minimum size etc.)
- examples on usage for both light and dark versions, tied in to dos and don'ts
Font files used in the logo, if any (licensing should be present as well, if applicable)