Most of my no show customers are being charged for commission whereas I try a lot to mark them as *No Show* but system doesn’t accept or prompt. How I can get rid from this pain

You have posted this on the partner forum so we cannot help with this if it is a technical issue.

Contact booking.com help team using Inbox icon on Extranet (Option booking.com messages) or give help team a call see link for local phone numbers. 

https://partner.booking.com/en-us/help/where-you-can-reach-us

Hi Qamar

There is a feature in Extranet for dealing with this.

https://admin.booking.com/hotel/hoteladmin/extranet_ng/manage/finance_reservations.html

Click that link then tick the reservations to dispute and then click the button upper right.

Even if you miss the cut off time to do it you can also just use the dedicated Partner guide to message the BdC for Topic:Finance and a subtopic.

If a guest doesn’t show up for their booking and you choose to waive the fee, it’s important to mark the reservation as a no-show so you don’t get charged commission.

Marking a no-show on the Extranet is easy. Just follow these steps:

1. Click the Reservations tab on the Extranet and select the reservation number.
2. Click Mark as no-show on the right-hand side of the page. This will be saved as a cancellation.
3. You and the guest will receive a confirmation email.

The Mark as no-show button is available for 48 hours, starting at midnight of the check-in date, then up to 48 hours (2 business days) after the check-out date.

Kind Regards

PS: your partner profile is incomplete, missing your listing URL, please add it as it can at time greatly help us help you on occasion.

Guide : How & Why Add your Listing to your Partner Community Profile

BdC Support Team : Dedicated Partner Contact Options - Visual Guide