I saw a business article recently with the title: Fake a Handwritten Note with these 4 online services.
Now call me old fashioned, but I think Handwritten notes should be just that...handwritten. Yes there are computer software programs that can generate notes with a handwritten font. And other companies that use a mechanical pen to write the notes. But those aren't genuine and your customers and clients can sniff that out a mile away.
As my mentor Pat Rigsby likes to remind us...should you really be building relationships around faking out your clients and trying to make them believe something that's really not (like sending them a computer generated card)?
No! Cards should always be handwritten. Take the extra time to care about your clients enough to write them a card. After all, if it wasn't for them, you wouldn't have a business.