i never find merchants that dont accept credit card for large transaction.
i swipe almost rm35k for 1 time at proton no problem.
or, how LARGE amount do u mean? rm100k?
possible they dont accept bcoz the discount rate (or we called it as fee/surcharge for credit card transaction), normal is around 0.5% - 3%.
so if u want to swipe rm100,000 and their rate is 3%, they will received only rm97,000.
rm3000 is a huge amount to 'loss'!
or, if u dont care, offer them to pay the surcharge ~

but usually merchant will tell if pay via card got surcharge or not? so why they dont want to accept if u pay the surcharge?
card dropped or get robbed, report bank and police immediately.
for fraud, bank usually call immediately to verify large amount. cimb even called me for rm60 swipe at shell previously!
(maybe bcoz the card never been swiped at shell).
and of coz my rm2k, rm9k also been verified by the bank.
leave the card at home, then how if the home get robbed while u outside?
by the time u at home, the card already been swiped somewhere, u call bank to suspend the card but its too late?
u can search previous thread, i already had experience.
my card had been fraud at kajang while i'm at kuantan (alibi by police report). bank absord the loss.
but let say if u leave ur card at home (kl), u also at kl, then ur house get robbed and ur card also been fraud at kl, how?

Actually, it's not the amount that's of concern but more towards the margin of the products concerned. I had swipe in excess of RM700K for purchase of a shoplot once upon a time and it was no problem at all, without any need to pay surcharge. In respect to car puchases, it depends on your relationship with the owner of the franchise as you will be surprised at the profit margins plus, if they are desperate to hit targets etc
But the most useful part of a high CL is obviously when you are overseas and had no access to your funds as charges can run into hundreds of thousands easily, depending on where you are etc. As to the fraud element, normally it's negligible what more with existing chip based cards.