If you see the message status Failed message delivery (DB62) then this message may be for an Indian MSISDN, which has been affected by the Indian TRAI Regulations.
Note: DB62 is an SMS 365, enterprise service status code.
Phone users in India are now allowed to specify which categories of messages are blocked or received. Therefore, in order to ensure your customers are receiving the required SMS, ensure the correct nature/category of each of your customer accounts is reviewed or registered.