I am on a live chat with Pentax USA - very helpful and easy to deel with here was the conversation. check out the link they provided and interesting when I posted my link to shot they said no problem .
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You have been connected to Randall S.
Randall S: Thank you for contacting Pentax Chat Support. How may I help you?
Pat Brough: Hello, I have a Pentax K5 that I got as a gift bought at Amazon at or around Nov. 20th. I think the time to return has poast. I do have the stain on my sensor and want to know the process to have replaced or fixed. Thanks in advance for your help
Randall S: have you confirmed you have the stain on the sensor and not just dust on it?
Randall S: Not all K-5 cameras are affected by the sensor "stain" problem. The K-5 review page on the Enticing the Light Web site has excellent information on how to distinguish between dust on the sensor and an actual sensor “stain”. It also has a very good assessment of the actual effect of the stain on images. We encourage you to visit the link below for this information.
Review – Pentax K-5 | Enticing the Light
Pat Brough: Yes,
here is link to a photo I took
Pentax K5 stains at F20 :-( | Flickr - Photo Sharing! Randall S: okay, we can send you a pre-paid UPS shipping label. We need your address, phone number, email address, serial number of the camera.
Pat Brough: Ok 1 second
Pat Brough: Patrick Brough - MY PERSONAL INFO WAS HERE the serial number is 383XXX
Randall S: okay, got it
Randall S: our corporate office will email you the shipping label to print.
Pat Brough: Do you need an email address?
Randall S: i already got the email address.
Pat Brough: lol I gave it when I signed in lol forgot
Randall S: MY EMAIL
Randall S: right
Pat Brough: correct
Randall S: also include a note describing the problem, your return shipping address and a copy of your sales receipt.
Pat Brough: Will do, I assume box it us as it came to me with all parts.
Randall S: we only need you to send the camera body, no lens or accessories.
Pat Brough: Ok thanks for your help. anything else I need to do at this point?
Randall S: no, that's all you need.
Pat Brough: great thanks. by the way LOVE the camera ;-) what is the estimated turn around time on this sort of thing?
Randall S: usually 3-4 weeks
Pat Brough: OUCH. ok thanks
Randall S: Thank you for dropping by, Pat, and have a great day!
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I will keep you all posted.