In the Philippine legal landscape, the relationship between a landlord and a tenant is governed by a combination of the Civil Code, the Rent Control Act, and tax regulations issued by the Bureau of Internal Revenue (BIR). One of the most critical, yet often overlooked, obligations of a landlord is the issuance of an Official Receipt (OR) for every rent payment received.

1. The Statutory Basis: The National Internal Revenue Code (NIRC)

The primary legal mandate for issuing receipts comes from Section 237 of the National Internal Revenue Code of 1997, as amended (often referred to as the Tax Code).

The Mandate: All persons subject to an internal revenue tax are required to issue a duly registered receipts or sales or commercial invoices for each sale or transfer of merchandise or for services rendered.
Threshold: Under the TRAIN Law (Republic Act No. 10963), the requirement to issue a receipt applies when the value of the transaction is P100.00 or more. Since residential and commercial rents almost always exceed this amount, the issuance of a receipt is mandatory.
Nature of the Document: It must be a BIR-Registered Official Receipt. A simple "acknowledgment receipt" or a handwritten note on a piece of paper does not satisfy the legal requirements of the NIRC.

2. Republic Act No. 9653 (The Rent Control Act of 2009)

Specific to residential leases, Section 11 of R.A. No. 9653 explicitly addresses the receipt requirement:

"A receipt shall be issued by the lessor to the lessee upon payment of the rent."

This law ensures that tenants have a verifiable record of payment, protecting them from claims of non-payment or unlawful detainer (eviction) suits.

3. BIR Rules and Regulations

The Bureau of Internal Revenue enforces the issuance of receipts to ensure proper tax collection (Income Tax and, if applicable, VAT or Percentage Tax).

Registration of Receipts: Landlords must apply for an Authority to Print (ATP) receipts. These receipts must contain the landlord's Taxpayer Identification Number (TIN), business name (if applicable), and address.
Electronic Receipts: With the advancement of the E-Invoicing System (EIS), some large-scale lessors are now required to issue electronic receipts, provided they are registered with the BIR's web-based portal.
Types of Taxes Involved:
VAT: If the landlord's gross annual sales/receipts exceed P3,000,000, they must issue VAT Official Receipts.
Percentage Tax: If the landlord is below the VAT threshold, they generally pay a percentage tax and issue Non-VAT Official Receipts.

4. Consequences of Non-Issuance

Failure to provide an Official Receipt carries both administrative and criminal liabilities for the landlord:

Surcharges and Compromise Penalties: The BIR imposes hefty fines (ranging from P1,000 to P50,000 depending on the frequency and nature of the violation) for "failure to issue receipts."
Criminal Liability: Under Section 264 of the Tax Code, any person who fails or refuses to issue receipts shall, upon conviction, be punished by a fine and imprisonment of not less than two (2) years but not more than four (4) years.
Oplan Kandado: Persistent refusal to register a business or issue receipts can lead to the temporary closure of the establishment/rental business by the BIR.

5. Rights of the Tenant

A tenant has the legal right to demand a BIR-registered receipt.

Evidence of Payment: In any legal dispute or eviction case, the Official Receipt is the primary evidence to prove that the tenant has fulfilled their financial obligations.
Tax Deductions: For commercial tenants, a BIR-registered Official Receipt is necessary to claim the rent as a deductible business expense. Without an OR, the tenant cannot legally deduct the rent from their own taxable income.

6. Common Misconceptions

"Acknowledgment Receipts" are enough: As mentioned, while they may serve as proof of payment in a civil court, they are not legal substitutes for BIR Official Receipts and do not absolve the landlord of tax liabilities.
Small-scale landlords are exempt: There is no "small-scale" exemption regarding the act of issuing a receipt if the payment exceeds P100. Even owners of a single studio unit are technically required to register with the BIR and issue receipts.
The Tenant must pay for the Receipt: The cost of printing and issuing receipts is a business expense of the landlord. It is illegal to charge the tenant an extra fee just to provide a legal receipt.

Summary Table: Legal Framework

Law/Regulation	Key Requirement
NIRC Section 237	Mandatory issuance of BIR-registered receipts for transactions over P100.
R.A. 9653 (Rent Control Act)	Specific mandate for lessors to issue receipts upon payment.
Revenue Memorandum Orders	Provides the specific format and registration process for receipts.
Revised Penal Code / Tax Code	Outlines criminal penalties for tax evasion and failure to issue receipts.