Checkout error - postcode outside UK

[Mr_Gareth]

Hi,
Several of our customers customers are having problems checking out.
When they enter their postcode (UK) during checkout, Actinic tells them that they are not in the UK and will not let them continue. All the users are UK based with UK invoice/delivery addresses.

The only thing I can think of, is their IP is non UK. Would this cause a problem and can it be solved? I have contacted the support team with no luck. Any ideas?

Many thanks,
Gareth

[pinbrook]

URL please .....

[Golf Tee Warehouse]

Are you using 'PostCode Anywhere' or any other post code lookup service.

The webiste URL would also be helpful as Jo has mentioned.

[Mr_Gareth]

URL - http://www.mst-toiletries.com/store/

I've setup a account for support.
Username: andrew.t@anchorprint.co.uk
Password: pass

[Mr_Gareth]

No postcode look up services being used.

[Golf Tee Warehouse]

One thing I noticed is when entering the delivery address the Country field was blank and open for customers to enter anything they liked, which I suspect is the cause of the problem.

Have you modified something to try and force only UK customers.

[pinbrook]

it freezes for me too, what customisation have you done?

[Mr_Gareth]

Very little customisation. Design only.

When users who experience the problem login using different PC, the problem is fixed.
Could it be a cookies issue?