diff --git a/A3.md b/A3.md
index 447eb121..861bdaad 100644
--- a/A3.md
+++ b/A3.md
@@ -49,6 +49,7 @@ Possible rendered URIs:
 - `bip352` (silent payments)
 - `bip353` (DNS addresses)
 - `bitcoin`
+- `bitcoincash`
 - `cashme` (Cash App `$`-prefixed cashtag)
 - `ethereum`
 - `lightning` (lightning address)
@@ -58,7 +59,10 @@ Possible rendered URIs:
 - `paypal`
 - `revolut`
 - `solana`
+- `tron`
 - `venmo`
 - `zcash`
 
 New widely deployed formats can be added to this list later.
+
+For an unknown payment `type`, in case of ambiguities, a specific address URI scheme may be used when one is available (such as `bitcoincash` from `bitcoincash:<address>`).