Bookem supports EFT Payments, once you receive notification of Payment, you can manually capture this receipt in Bookem Accounts - Payments and your client will automatically receive confirmation of this receipt. (Invoices and Payments is a Bookem Plus feature, please contact us if you would like to trial Bookem Plus)
To add your Bank Details to your invoice, go to Payments & Invoicing - Payment Methods. click on the +Add payment method on the top right, and Add a "Bank Transfer" payment method.
Decide if you want to accept EFT payments for online payments (this will mean that you have to manually mark the booking as paid, for the online booking to be confirmed)
Toggle the "Display on invoice" to on
Insert your Bank Details and payment instructions such as "Please use invoice number as reference"
Read more about reconciling accounts manually