Getting paid by a university Prof?

[nctnico]

I would send a bill along with a polite note and see what happens.

Sorry, but IMHO this is the worst advise. Sending an invoice out of the blue lands you on the stack with scammers. It might even get you into legal trouble for trying to scam money.

Never ever send an invoice to a big organisation like a university (or a bigger company) without a PO (purchase order) number. In addition I always put the name of the person in charge of the purchase at the client on the invoices I send. So if there are questions about the invoice, the financial people know who to contact within their own organisation.

[mikeselectricstuff]

I would send a bill along with a polite note and see what happens.

Never ever send an invoice to a big organisation like a university (or a bigger company) without a PO (purchase order) number. In addition I always put the name of the person in charge of the purchase at the client on the invoices I send. So if there are questions about the invoice, the financial people know who to contact within their own organisation.

Absolutely -  must have a PO number to get anywhere in a finance dept.