diff --git a/tailbone/views/purchasing/receiving.py b/tailbone/views/purchasing/receiving.py
index b5332f2d..8c935587 100644
--- a/tailbone/views/purchasing/receiving.py
+++ b/tailbone/views/purchasing/receiving.py
@@ -1077,20 +1077,22 @@ class ReceivingBatchView(PurchasingBatchView):
         key = self.rattail_config.product_key()
         if key == 'upc':
 
-            # we prefer "exact" UPC matches, i.e. those which assumed the entry
-            # already contained the check digit.
-            provided = GPC(entry, calc_check_digit=False)
-            rows = [row for row in batch.active_rows()
-                    if row.upc == provided]
-            if rows:
-                return rows
+            if entry.isdigit():
 
-            # if no "exact" UPC matches, we'll settle for those (UPC matches)
-            # which assume the entry lacked a check digit.
-            checked = GPC(entry, calc_check_digit='upc')
-            rows = [row for row in batch.active_rows()
-                    if row.upc == checked]
-            return rows
+                # we prefer "exact" UPC matches, i.e. those which assumed the entry
+                # already contained the check digit.
+                provided = GPC(entry, calc_check_digit=False)
+                rows = [row for row in batch.active_rows()
+                        if row.upc == provided]
+                if rows:
+                    return rows
+
+                # if no "exact" UPC matches, we'll settle for those (UPC matches)
+                # which assume the entry lacked a check digit.
+                checked = GPC(entry, calc_check_digit='upc')
+                rows = [row for row in batch.active_rows()
+                        if row.upc == checked]
+                return rows
 
         elif key == 'item_id':
             rows = [row for row in batch.active_rows()
@@ -1162,6 +1164,9 @@ class ReceivingBatchView(PurchasingBatchView):
             if len(entry) > 14:
                 return
 
+            if not entry.isdigit():
+                return
+
             provided = GPC(entry, calc_check_digit=False)
             checked = GPC(entry, calc_check_digit='upc')