How soon should you send a reminder notice?

[markcosilver]

The customer has bought two items a few days apart.

The second item was a counter offer by me which he accepted.

I then sent a combined purchase order including payment details and am still waiting for payment or even a response.

Even wondered if he had received the purchase order from ebay as there doesn't appear to be anywhere in my "messages sent" section of ebay showing that I even sent him one.  Yet I know I did as I have a copy in my personal email account with the verification number.  Is that standard practice not to have a history of purchase orders and invoices somewhere on ebay?

If there is I can't seem to locate it. 

The last item was purchased on the 19th.

Should I send him a friendly reminder or wait another day?

Both significant valued items.

Thanks.

[*new2vintage]

You receive an email copy of every invoice and you usually receive an email notice every time an item is sold - ebay might fail to send a notification sometimes. You can open a non paying bidder case after 4 days and close it 4 days later so it's okay to send a reminder now. A buyer is more likely to pay via Paypal than direct deposit which is an unsafe payment method.

[fancytoshop]

I normally send a reminder email day 4 or 5 after purchase. 

[thecatspjs]

When you send an invoice a copy does not show in the outbox of ebay messages.

More detailed information regarding the number of emails sent to a buyer, do show in the ebay tool selling manager, but you need to subscribe to this free ebay service.

As this is a combined purchase of two significant items I would probably send a friendly message, rather than another invoice.