Home » LinkedIn Adobe Acrobat » Using Adobe Sign, you would like to send a document for two colleagues to approve. However, when you attempt to add the document to the files to be sent for signature, that file type is grayed out. What file type is not eligible for Adobe Sign? Using Adobe Sign, you would like to send a document for two colleagues to approve. However, when you attempt to add the document to the files to be sent for signature, that file type is grayed out. What file type is not eligible for Adobe Sign? by Editorial Staff Advertisement 5shares Facebook LinkedIn Pinterest Twitter Email GIF JPEG BMP PSD Join our listSubscribe to our mailing list and get interesting stuff and updates to your email inbox. Thank you for subscribing.Something went wrong.We respect your privacy and take protecting it seriously