Mismatching BTC deposit addresses

Occasionally when paying an invoice, I see the the BTC (On-Chain) Addresses listed is actually different than the address I deposited to listed under On-Chain payments (see image below).

It seems to happen about 25% of the time, and I am not sure why. I would expect these two addresses listed to always be the same. The address displayed in the checkout page is the On-Chain payments address.

Environment Ubuntu 16.04 BTCPay Server master at be90172840f1a891da2ca6ace898bbac04b337c8 Manual Deploy with Bitcoin Core Testnet master / NBxplorer master

To Reproduce

• Turn on 0-conf
• Pay several $1.0 invoices on testnet
• Inspect Invoice Details for Mismatch

[conscott]

Ahhhh, okay that makes sense.

In my test I was making partial payments on purpose, but with address re-use. I didn’t notice the deposit addresses updating on partial pay, just the balance.

I suppose the UI can look a little confusing when this is done, since it lists an unused Onchain deposit address for a fully paid invoice.

I know address re-use should be discoured, so I was doing things ‘the wrong way’, but if there is any action to take here I might suggest listing all deposit addresses associated to an invoice, although I know it’s pain the for data structures in place. Your call.

I will go ahead and close this. Thank you all for the quick response!

[astupidmoose]

This is normal for partial payments.

Partial payments generate a second address to be used for the remainder of the payment. Your second payment should be going to the new address generated under “paid summary” vs the used address.