Sales mandate agreement: what it is and what it must include

What a sales mandate agreement actually is

It is a contract for the provision of estate agency services. In Spanish practice, many agencies use their own templates or forms adapted to regional estate agency regulations. The name may vary (sales mandate, sales instruction), but the function is the same: to authorise the agency to find a buyer, advertise the property and coordinate viewings under specified terms.

It does not oblige you to sell at a specific price unless the contract clearly states so, but it can require you to pay fees under specific circumstances even if the sale is completed through another channel. This is why sole agency terms, duration, and fee or advance payment clauses are so important.

Essential information that should be included

• Full identification details of the property owner (or authorised representative) and the agency.
• Description of the property: address, land registry cadastral reference if available, and preliminary ownership details.
• Guide sales price or agreed price range for marketing.
• Fees: percentage or fixed amount, VAT if applicable, and when they fall due (upon signing the title deed, upon deposit contract, etc.).
• Duration of the mandate and method of extension or renewal.
• Sole agency or open agency agreement (and what happens if you sell independently).
• Marketing costs borne by each party (photography, property portals, signage).
• Data protection and use of property images.

Sole agency vs open agreement

Under an open (non-exclusive) agreement, you can continue advertising on your own or hire another agency, but you must check whether there is a "buyer protection clause": if a prospective buyer contacts you through the agency and you complete the deal directly with them outside the agreement, fees may still be payable.

Under a sole agency agreement, only that agency markets the property for the agreed period. This usually involves greater marketing investment, but also requires a commitment from you not to sell through other channels without paying commission. Further details can be found in our article on sole agency agreements with estate agencies.

Fees: questions to ask before signing

1. Are fees payable only upon formal completion at the notary, or also upon signing a deposit contract?
2. What happens if the buyer is a relative or a contact you made prior to the agreement?
3. Do fees include VAT, and are all other expenses itemised?
4. Is there a minimum sole agency period even if you wish to terminate?

Regional regulations and the Civil Code (governing mandates) may restrict unfair terms in consumer contracts. If anything seems disproportionate, it is wise to obtain legal advice before signing, rather than after receiving an invoice.

How it fits into the rest of the sale process

The sales mandate agreement does not replace the required documents for selling a property or the deposit agreement with the buyer. The agency manages the marketing; the legal transaction remains your responsibility (supported by a solicitor and notary where appropriate).

If you have not yet chosen an agency to work with, comparison criteria can be found in how to choose the best estate agency to sell your flat (mandate, area, support).

Common mistakes when signing

• Failing to read the fee clause regarding selling independently during a sole agency period.
• Signing a long contract duration without a clear termination clause.
• Authorising a listing price that differs significantly from the net figure you require.
• Failing to agree in writing who pays for the energy performance certificate or professional photography.

A well-drafted mandate aligns expectations: you know what you will pay and the agency knows its marketing budget. If you want to sell with expert support in Madrid, Valencia, Mallorca or Zaragoza, at Sky Real Estate we manage this through our residential sales and development service.