O Jaimini, anybody who smells the Tulasi leaf which has emanated from Lord Sri Visnu, whatever sins he has in his body are all destroyed. (Padma Purana, Kriya Yogasara 11.135)
If a sinful person leaving his body has a Tulasi leaf in his mouth, he goes to the abode of Lord Sri Visnu. I say this is truth. (Padma Purana, Brahma Khanda 22.7)
Anybody who has a Tulasi wood necklace around his neck, even if he is unclean or performs many bad activities, he is taken with full respect to the abode of Lord