I'm sorry - was not clear enough: I have 2 (or more) prepaid options: 100% prepaid, 50% prepaid/50% before shipment aso.), all contain the word "prepaid", that is the goal

I did'n get you. can specify more ?

okay, I'll try: payment terms available: 100% prepaid, 50% prepaid, 25% prepaid, in 30 days, in 3 days, aso.

For each invoice with a condition containing "prepaid" I would like to add / highlight: "You really have to pay before you get your item! Please use the following ..."

[[ payment_term == '100% prepaid' or payment_term == '50% prepaid' or payment_term == '100% prepaid' or payment_term == '25% prepaid' and "You really have to pay before you get your item!" ]] try this otherwise you can create method and do.

found a link to phyton types: https://docs.python.org/2/library/stdtypes.html#boolean-operations-and-or-not

so this seems to work - it's a bit simpler than to type each condition, could you test and confirm:

[[ 'prepaid' in o.payment_term.name and 'You really have to pay before you get your item!' ]]

[[ 'prepaid' in o.payment_term.name and 'You really have to pay before you get your item!' ]] yes this will work.

thanks a lot

Have you got solution ?