Lil Wayne Suuure the Check's in the Mail ... Driver Wants Cash Again

Lil Wayne hashed out a settlement with the tour bus driver who claims Weezy threatened to kill him, but the problem is he forgot to send the check ... according to the driver, who's filed a new lawsuit.

According to the docs ... Mark Jones claims he hasn't seen a cent of the $75k settlement dough. We broke the story ... Jones claims Wayne unloaded a death threat during a 2014 ride between tour stops.

Jones also wants an extra $887.52 in interest ... which he's been calculating from August 29th.