My doubles partner is having to enter using a 21 game average at of jan 1,  what do I need to bring to verify this average?? 

 Have your league secretary give you a copy of that weeks standing sheet and just to be safe have the secretary sign the sheet. This should be sufficient but to make sure call he tournament manager and ask him if it will be accepted.

some bowling centers and secretaries also have a form specifically for that purpose, so between taking a copy of the standings sheet and an average verification form, you and your doubles partner will be covered.

 You can bring an average verification form signed by you association manager. If you bring a standing sheet, make sure it is the one closest to Jan1. available. They will not accept a current standing sheet.

I thought I saw a link to the form in one of the posts..