When paying an MTNL Delhi landline or broadband bill using a physical cheque, the payment instrument must be drawn explicitly in favor of "MTNL Delhi" or "Mahanagar Telephone Nigam Limited". Subscribers must write their correct telephone number, customer account identification number, and contact details on the reverse side of the cheque before depositing it at designated MTNL Sanchar Haat customer service centers, authorized collection drop boxes, or partnered banking institutions across the national capital region to ensure correct credit allocation.