diff --git a/Elwig/Helpers/Utils.cs b/Elwig/Helpers/Utils.cs
index a422c33..a68de9f 100644
--- a/Elwig/Helpers/Utils.cs
+++ b/Elwig/Helpers/Utils.cs
@@ -91,11 +91,22 @@ namespace Elwig.Helpers {
             return await ctx.Members.FindAsync(mgnr) != null;
         }
 
+        public static async Task<bool> VNrExists(AppDbContext ctx, int vnr) {
+            return await ctx.Contracts.FindAsync(vnr) != null;
+        }
+
         public static async Task<int> NextMgNr(AppDbContext ctx) {
             int c = await ctx.Members.Select(m => m.MgNr).MinAsync();
             (await ctx.Members.OrderBy(m => m.MgNr).Select(m => m.MgNr).ToListAsync())
                 .ForEach(a => { if (a <= c + 100) c = a; });
             return c + 1;
         }
+
+        public static async Task<int> NextVNr(AppDbContext ctx) {
+            int c = await ctx.Contracts.Select(co => co.VNr).MinAsync();
+            (await ctx.Contracts.OrderBy(co => co.VNr).Select(co => co.VNr).ToListAsync())
+                .ForEach(a => { if (a <= c + 100) c = a; });
+            return c + 1;
+        }
     }
 }