At McCay Duff,  our job is to simplify your financial transactions.  You can pay your bill using one of the following methods:

Online Banking

  • Add McCay Duff as a payee.
  • You will be prompted to enter your account number, which can be found at the bottom of your invoice. (ex. DL4536AW)


  • Send us a cheque to 979 Bank Street, Suite 210, Ottawa Ontario, K1S 5K5.
  • Please indicate your client and invoice numbers, which are located on your invoice.

Credit Card

  • You may pay your invoice by credit card by clicking the “pay now” button on the electronic invoice sent to you by our payment system.
  • You may contact our staff at 613-236-2367. Our staff are unable to take any credit card information for processing by telephone, however, they can initiate a payment link to be sent to you by email from our payments system, which will allow you to enter your credit card information for payment of your invoice or any part thereof.

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