"To accompany this document" means to include or be included with this document. It suggests that there is another item or piece of information that should be provided alongside the mentioned document. Full definition
You will have to submit some type of proof that you have obtained coverage, such as a copy of the policy or other accompanying documents. (insuranceproviders.com)
The resume, cover letter, and any other accompanying documents that come from the job candidate should be alike in format and feel. (thecareerexperts.com)
This easy - to - implement resource includes accompanying document - based questions that focus on key strategies for breaking down informational text to help students build cross-curricular reading skills. (hand2mind.com)