diff --git a/public/pos/cashup.html b/public/pos/cashup.html
index 2148c88..feda6fc 100644
--- a/public/pos/cashup.html
+++ b/public/pos/cashup.html
@@ -454,7 +454,11 @@ async function printCashup(){
     const xml = window.EposPrint.buildEposCashupXml(letterhead, report, cashupBlocks, cashupLogo);
     if(settings.type === 'network'){
       if(!settings.ip){
-        alert('Set the printer IP address in Printer settings first.');
+        // The printer form lives on the slip screen, not the Settings
+        // page — tapping the "Printer: …" row there expands it. There is
+        // only one saved setting (pos.printerSettings), shared with the
+        // sale slip, so point the operator at the one place it exists.
+        alert('No printer IP set. Print a sale slip, tap the "Printer: …" row on that screen, and save the IP there — the cash-up slip uses the same printer.');
         return;
       }
       await window.EposPrint.printViaNetwork(settings.ip, xml);
@@ -467,7 +471,8 @@ async function printCashup(){
       // button does nothing at all. Same stance as EposPrint.printTest().
       throw new Error(
         'The cash-up slip prints over the network printer only. ' +
-        'Set the printer to Network (and its IP) in Printer settings.'
+        'Print a sale slip, tap the "Printer: …" row on that screen, ' +
+        'and switch it to Network with the printer IP.'
       );
     }
   }catch(e){