A Blog About Intellectual Property Litigation and the District of Delaware

Entries for tag: COS

Waste Basket
Gary Chan, Unsplash

It's a bit of a slow news day for the subjects we typically cover, so I wanted to write about an exciting and under-covered topic: Certificates of Service in the District of Delaware!

A Certificate of Service (COS) is a document at the end of the filing that says who the document was served on. Back in the days of paper filing, it was important to show who received a copy of a document.

Now we have CM/ECF, the Court's electronic filing system, which automatically generates a Notice of Electronic Filing (NEF) when anything is filed. Federal Rule of Civil Procedure 5(d)(1)(B) specifically says that "[n]o certificate of service is required when a paper is served …