diff --git a/doc/release-notes.md b/doc/release-notes.md
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -23,6 +23,16 @@
   field with strings that explain when fields are being ignored or
   inconsistent, if any.
 
+Note: some low-level RPC changes mainly useful for testing are described in the
+Low-level Changes section below.
+
+- The `sendtoaddress` RPC never had this check, so to normalize the behavior,
+  `minconf` is now ignored in `sendmany`. If the coin selection does not
+  succeed due to missing coins, it will still throw an RPC error. Be reminded
+  that coin selection is influenced by the `-spendzeroconfchange`,
+  `-limitancestorcount`, `-limitdescendantcount` and `-walletrejectlongchains`
+  command line arguments.
+
 RPC importprivkey: new label behavior
 -------------------------------------