I probably did over $8,000.00 in rebates last year and early this year.
I have NEVER certified any letter to a rebate house, and many of my rebates were for $100.00, $150.00 and a couple at $200.00
I have only had 1 rebate that was CLAIMED not to have been received (I have my doubts about that), and it was paid 2 weeks later after I faxed the materials in.
Bottom line for me - certified mail would be a waste of money.
3...2...1...locked. Try Off-Topic next time.