My father received pepper seeds in a tomato seed package. So yep, it is possible.

Vieja

Glad to see you love your husband. Love means you trust him. OF course he would never pull your leg.

Now if you were married to me, you could be sure I switched the seeds. Chiles are way better than rainbow bells. I have not grown bells in about 20 years. Only chiles. Love Those Chiles.

Bell peppers! ptui!!!

Jim

There is a Bolivian rianbow chile pepper.

http://www.growquest.com/pepper%20bolivian_rainbow_.htm

Surely he could tell the difference between pepper seeds and tomato or flower seeds. That would have been obvious.

However, most varieties of peppers look almost identical to me. Could they be mixed up in the packets? Can't say that I've grown enough peppers from seed to really answer that.

I did get both green and yellow beans from my yellow bean seed purchase this year, though. And as far as I remember, the seeds all looked the same.

If you mean my father, then yep, he knew that he got the wrong seeds. Just letting the OP know that it's possible to get the wrong seeds.