I’m trying to find blank plastic rectangles like ID cards and licenes are printed on. I’m making place seatings for a murder mystery party my parents are throwing and need ID cards so the people can assume their new identities.

Where can I buy plastic ID card blanks?
Can I run them through my printer?

I asked this question before and somebody mentioned clear plastic print-on stickers to stick on the plastic ID cards instead of printing directly on them. If that would work better, I need to know where to buy the clear print-on stickers AND the blank ID cards.

You can buy the sticker sheets in any craft store. Look in the section where they have the scrap booking papers. The ID card plastic badges can be purchased in an office supply store.

ID Office Products