Rent receipts on individual name rent cheque on company name

1. I am a landlord & issueing the rent reciept for a commercial premises in the personal individual name, but most of the time the tennants are giving the rent cheque from their firm account where they are the propriotor / partner & sometimes from other firm of their spouses. Is it legal/correct for me to accept others cheque ( of firm or their spouses firm account.). 2. In a commercial rented premises after the death of a tenant where the rent reciept is in the individual name, can the landlord accept the rent from their heirs or from the firm of the heirs.