One receipt, one row
Click + Attach receipt in the right section. A pop-up asks for the recipient, description, date and amount. The amounts in the table come from there and can't be typed over.
Not paid in EUR?
Paid in cash: attach an OANDA screenshot for the receipt date. Paid by card or bank transfer: attach the redacted statement line with the EUR amount charged. The charged amount is what gets reimbursed.
English or German only
For any other language the pop-up fills in a translation sheet. From 250 EUR the sheet also records the net amount and VAT.
Food and catering
Every food receipt needs a hospitality receipt (Bewirtungsbeleg), which the pop-up fills in. Attach one participant list for all food receipts and every Bewirtungsbeleg reads "See participant list".
Over 500 EUR
Attach at least three offers from potential suppliers, or explain why there are fewer. Missing offers are flagged in the Excel overview.