Arrived at the job for 2 blower cleaning and Install a new Turbo capacitor and repair the return flex (8 inch). Customer signed the authorization to enter work at home. The work is complete, Robert does not make the payment (balance) because he wants to have the invoice on paper, I explained to him that this is not the process. I talked to Sascha and he was talking to the customer for 30 minutes explaining but the customer said that he wants the paper invoice first before making any payment.