Delivering overdubs

If you’re sending overdubs for a mix and they need to sync to an existing multitrack mix I’m working on, please be sure to include the reference file/mix you’re overdubbing to and be sure that all the files have the same start time as the reference file. Alternately include a snippet of the reference file or countoff in the audio you’re sending me so I have a prayer of syncing your files to the existing multitrack.