If they need to continue editing, you need to send them an AI file.
What kind of artwork is it? (logo, illustration, technical dawing ...)
Does it contain linked files? What kind of objects does it contain? Text?
What will they use it for?
Will they use Illustrator to edit the file? The same version as you?
It's for an illustration that I have created for a colouring book. It will not contain any text. They only stated that they wanted a source file if illustrator or photoshop was used. I just wanted to make sure I submit the correct file type.
Also, They have stated that they want the resolution to be 300 dpi, but as far as I know, I can only adjust the PPI in illustrator. Have they just typed the wrong thing, or am I missing something?
Thank you for the help!
Some people use DPI and PPI as synonyms. Assume they mean PPI in this context.
For AI files, create them at the physical size you need. PPI is something that is set on export to a raster format, which it sounds like you won't need to do.
Set your document raster effects to 300 PPI. This ensures that any raster effects (like drop shadow or inner glow) are rendered at a high enough quality.
Thank you for your help!