When can I open a UPI?

[5kazam2]

Buyer purchased small item on 1st May, paid straight away with an eCheque (Total incl. post $12.45)

PayPal advised yesterday, 4th May, eCheque was not honoured.  eBay sold section said to send invoice, which I did. 

I also sent a message to the buyer requesting a replacement eCheque or pay by direct credit.  He then messaged to say

"sorry mate late reply been workin ill have to give it a miss sorry mate me mate wanted me to buy it but hasnt given me the money yet sorry". 

This buyer also has a few negative/positives on his FB.

So when can I open the UPI?  4 days from original payment, or 4 days from dishonoured cheque/invoice sent?

[5kazam2]

Agreed.  Had originally thought, okay post off, no big deal.  Then sixth sense jumped in and told me NO,  he could cancel the cheque.  So sixth sense was right.

One UPI strike coming up, and with the SA attitude in his message, one I'm going to be happy to give.