You will need to provide original receipts, and a completed and signed B1. Miscellaneous Expense Worksheet, including PI approval. You can find this form on the GGSE Resources page, under section B. Reimbursement Forms/Guides.
If you are submitting an entertainment expense (e.g. refreshments, snacks, and catering), provide the B3. Event Expense Worksheet. Include a list of participants (if applicable) and appropriate host signature and PI approvals.
It should be submitted within 2 weeks of event date. All other expenses should be submitted in a timely manner.