What do you do if in another State they ask for your Texas car registration?

What do you do if in another State they ask for your Texas car registration?
There are 3 situations I can think of that would prompt someone to ask you for your Texas Car registration:

1. Assuming your car is registered in Texas, you are in another state, are pulled over by the police, and the officer asks to see the registration. SHOW IT TO THEM! Or would you really rather be taken into custody than get a ticket?

2. Or...if you are moving from from Texas to another state are at their department of motor vehicles to change your car registration : again, if they ask for your old state's registration, why wouldn't you give it to them? You certainly cannot have the same car registered in multiple states at the same time (legally.)

3. The 3rd would be if you had just been in a traffic accident with someone and the other driver is asking for your registration...As far as I know EVERY state requires that drivers "swap information" (Driver's License, Registration, Insurance) when there is an accident. You aren't going to GIVE them your paperwork to take, but let them see it so they can copy down information from it for their insurance companies or police reports. After all, if you do NOT show your info to the other driver he or she will probably call for the police, and then you'll have to show it to the police officer anyway. ...


To whoever made this answer, in Texas the registration is a sticker not paper.