Cheques on cows revisited

Snopes says it’s a myth, but was a cheque ever written on the side of a cow and cashed?

Barclays Bank is currently running adverts on the London Underground, and one of the posters says “The UK’s strangest cheque was written on the side of a cow in 1970 [it specifies the month, but I can’t remember it]. It was led into a branch of Barclays and cashed.”

So, did this ever happen? Googling turns up nothing. Surely that well-respected financial institution wouldn’t go propagating urban folklore, would it?

Have you tried asking Barclays? They should know.

Well, that was going to be my next line of enquiry. I suppose that in the spirit of stamping out ignorance I should ask them.

Cecil has this to say:

But!