The DVLA site does take a little while to update, especially if the car was taxed at a post office because it has to wait until the returns come back from the PO. It should be there by now though.
Just be vigilant and look for any signs oif a forged tax disc. If they can produce a reciept for it so much the better.
Kevin
The update from the PO is now virtually straight away, thanks to barcode scanning etc. Its no longer the case that DVLA have to wait until the Tax Disc Book stubs get to Swansea. Could be the seller is disabled and the disc is therefore at the disabled (zero) rate. 01/01/07 would be the expiry date of the last paying disc? If a genuine disabled rate disc, you would need to change and pay for the due rate as of date of your purchase.
However, I would be guessing at an iffy tax disc.
Verify the silver bar strip across the centre.
Look for the two oval punched holes - should be crisp and sharp and not done with a craft knife....
Check that the back of the disc is also printed - some peeps only scan the front....
Ensure there are punched holes around the edge of the disc and not scissor cut.
If it looks and feels greasy, could be that an ink disolver has been applied and the writing is now unreadable
Its not the running about without tax thats the problem, its the fraudulent display that p*sses peeps of when they are knicked....
HtH
B