No printing conformations

go to the fax repots,conformations,their u select send only.

To change fax confirmation
1. Press Setup.
2. Press Print Report, and then Fax Confirmation.
3. Press the right arrow button to select one of the following, and then press OK.

Off - Does not print a fax confirmation report when you send and receive
faxes successfully. This is the default setting.

On Fax Send - Prints a fax confirmation report for every fax you send.
On Fax Receive - Prints a fax confirmation report for every fax you receive.
Send & Receive - Prints a fax confirmation report for every fax you send and receive.

If you need printed confirmation that your faxes were successfully sent, follow these instructions to enable fax confirmation before sending any faxes. Select either On Fax Send or Send & Receive.

The default fax confirmation setting is Off. This means that the HP All-in-One will not print a confirmation report for each fax sent or received. A confirmation message indicating whether a fax was successfully sent appears briefly on the display after each transaction.

To enable fax confirmation from the control panel

1. Press Setup.

2. Press 2, and then press 3.

This selects Print Report and then selects Fax Confirmation.

3. Press to select one of the following, and then press OK.

Off Does not print a fax confirmation report when you send and

receive faxes successfully. This is the default setting.

On Fax Send Prints a fax confirmation report for every fax you send.

Fax

On Fax Receive Prints a fax confirmation report for every fax you receive.

Send & Receive Prints a fax confirmation report for every fax you send and

receive.

It's gone forever, once your machine received a EOT (end of transmission signal), your fax machine thinks it was received OK and clears it from memory.

open door and press clear press 1 close door

This is an excerpt of the User's Guide for your machine. You can download from here:
http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&product=1138342&


Print fax confirmation reports
If you need printed confirmation that your faxes were successfully sent, follow these instructions to enable fax confirmation before sending any faxes. Select either On Fax Send or Send & Receive.
The default fax confirmation setting is Off. This means that the HP All-in-One will not print a confirmation report for each fax sent or received. A confirmation message indicating whether a fax was successfully sent appears briefly on the display after
each transaction.
To enable fax confirmation from the control panel
1. Press Setup.
2. Press 2, and then press 1.
This selects Print Report and then selects Fax Confirmation.
3. Press to select one of the following, and then press OK.

Off Does not print a fax confirmation report when you send and
receive faxes successfully. This is the default setting.
On Fax Send Prints a fax confirmation report for every fax you send.
On Fax Receive Prints a fax confirmation report for every fax you receive.
Send & Receive Prints a fax confirmation report for every fax you send and receive.
User Guide 65
Fax
Tip If you choose On Fax Send or Send & Receive, and scan your fax to send from memory, you can include an image of the first page of the fax on the Fax Sent Confirmation report. Press Setup, press 2, and then press 2 again. Select On from the Image on Fax Send Report menu.

The FAX machine will print the Tel number that has been programmed in your machine. It does not print on the basis of the caller ID received. So i think if you remove the number programmed in your fax machine

You can get the manual here if you do not have one - LINK.

Here is an exert form the manual on this:
Print fax confirmation reports
If you need printed confirmation that your faxes were successfully sent, follow these
instructions to enable fax confirmation before sending any faxes. Select either On
Fax Send or Send & Receive.
1. Press Setup.
2. Press 2, and then press 1.
This selects Print Report and then selects Fax Confirmation.
3. Press to select one of the following, and then press OK.
Off Does not print a fax confirmation report when you send and
receive faxes successfully. This is the default setting.
On Fax Send Prints a fax confirmation report for every fax you send.
On Fax Receive Prints a fax confirmation report for every fax you receive.
Send &
Receive
Prints a fax confirmation report for every fax you send and
receive.

I am not technically qualified for faxes but most fax machines i have used have a setting that allows you to have a receipt that prints off after you have sent one, this is something that can be turned off if not wanted, look in the manual and it will tell you how to reset it, i think it was called "polling" after a fax has been sent it prints off this little bit that says what time it was sent how many copies and time received, fax number it was sent to and sometimes company name etc some machines i have seen and used have a poll button after you have sent your fax, try just pressing it, it may print out a conformation receipt of the last ten faxes sent hope i have helped, if so rate me please