I either get the gate code before the first clean or, unfortunately, I can't do the job. 
I know this is based on trust, on the part of the customer, but I have my name and mobile number on the van and my payment slip I leave them has my address on! What more do they want. 
I think these type of people aren't rude, they are just so busy they forget about us. 
So no code...no clean!
I did a quote at a huge house where the lady told me that if I phone her when I pull up, she can open the electric gates remotely using her phone, and then phone her again when I leave. 
'Supposing you're in a meeting' I said. 
She said 'that hardly ever happens'.
I think I left skid marks!