how does Apple wipe the data on trade in devices?

monsterzro_nyc wrote:

my company has several old macs that we are retiring. However our security team wants to know how Apple wipes the data from any machines traded in to them.

Thanks.

Apple doesn't do that, it needs to be done beforehand by the user as outlined here What to do before you sell, give away, trade in, or recycle your Mac - Apple Support

monsterzro_nyc wrote:

got it, I think they were hoping to at least get a certificate that the data was wiped, even if we wiped it before hand.

If your IT security team wiped it themselves, why would they need a certificate from Apple?