Thanks for the responses! So it looks like Venmo alone is just not able to do this sort of simple tracing of payment to purpose.

We do have a Square account and used Register/POS successfully in the past - the tablet it was set up on sadly died during the COVID hiatus. Will take a look at replacing that (it was great for cash sales tracking and reporting as well) and/or investigating the Zettle system. We're of course striving to minimize any fees bite.

Thanks,

Don