Sams Club - No warranty if your Sam's club membership expires!
I purchased a battery for my Ford F150 about 1.5yrs ago which recently died. My membership has since lapsed and I no longer have a copy of my receipt.
Their customer service will not look up my account to retrieve the purchase information (for proof and date of purchase) and will not honor the warranty (full replacement for 2 years, plus pro rated up to 84 months) unless I pony up and rejoin their organization of world destruction once again. What a load!
After having learned about Wallmart's and Sam's club practices (forcing American jobs overseas and killing small town businesses) I choose to never shop or support their stores again. This is further confirmation to avoid these establishments.