diff --git a/libgnucash/quotes/gnc-fq-dump.in b/libgnucash/quotes/gnc-fq-dump.in
index 6c595a8356..6f11f8d82b 100755
--- a/libgnucash/quotes/gnc-fq-dump.in
+++ b/libgnucash/quotes/gnc-fq-dump.in
@@ -141,6 +141,25 @@ sub report {
   }
 }
 
+sub chk_api_key {
+  my $exch = $_[0];
+  my $url = " https://wiki.gnucash.org/wiki/Online_Quotes#Source_Alphavantage.2C_US\n";
+  if (($exch eq "currency") || ($exch eq "alphavantage")
+  ||  ($exch eq "vanguard")) {
+    die "ERROR: ALPHAVANTAGE_API_KEY *must* be set for currency quotes and \n" .
+        " stock quotes with source 'alphavantage' or 'vanguard'; see\n" . $url
+      unless (defined ($ENV{'ALPHAVANTAGE_API_KEY'}));
+  }
+  if (($exch eq "canada") || ($exch eq "nasdaq")
+  ||  ($exch eq "nyse")   || ($exch eq "usa")) {
+    printf("WARNING: Multiple Source '%s' will not be able to use alphavantage " .
+        "unless ALPHAVANTAGE_API_KEY is set; see\n%s", $exch, $url)
+      unless (defined ($ENV{'ALPHAVANTAGE_API_KEY'}));
+    }
+}
+
+############## end of functions - start mainline #########################
+
 # Check for and load non-standard modules
 check_modules ();
 
@@ -162,6 +181,7 @@ if ($ARGV[0] eq "-v") {
 }
 
 my $exchange = shift;
+chk_api_key ($exchange);
 if ($exchange eq "currency") {
   my $from = shift;
   while ($#ARGV >= 0) {