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Inquire now for a FREE consultation with a confidential private investigator at SPI


SPI offer discreet mystery shopper experience services to support your business.

What is a Mystery Shopper Investigation?

A mystery shopper investigation is a services provided by SPI to assess the quality of customer service provided by a business or organisation. The investigation is carried out by our undercover private investigators who pose as regular customers and evaluates the service provided by the business. Our mystery shopper private investigators may visit the business or organisation multiple times, interact with employees, make purchases or ask for various services. SPI also document our observations, such as the cleanliness of the premises, the friendliness of the staff and the accuracy and speed of the service. The objective of our mystery shopper investigations is to provide the business or organisation with an clear assessment of their customer service but also identifying strengths and  areas for improvement. Investigation findings can be used to improve customer service training and policies, enhance employee performance but ultimately improve customer satisfaction.

SPI Professional Associations

ABI Logo

Association of British Investigators

armed forces covenant

Armed Forces Covenant Bronze Awarded

institute of professional investigators

Institute of Professional Investigators

UK PIN logo

UK Private Investigators Network

What Does an Undercover Mystery Shopper Look For?

An undercover mystery shopper investigation is merely a service provided to highlight and evidence what a regular customer would experience when visiting an establishment. The difference is we provide a fair and detailed report of our experience on completion of our visit, and make reasonable recommendations on how to improve but also give praise where deserved. SPI detail the whole experience from first approaching the establishment to utilising the services and amenities available. We give a clear snapshot of how a business is performing operationally, which can then be repeated at different times of the day or different days of the week. We can also keep an eye out for anything specific a business owner wants us to look for which can be disclosed during the initial consultation period. See below the general list of areas we report on for our Mystery Shopper Experience services which we provide for businesses across the West Midlands and East Midlands. Mystery Shopper services can be utilised for all types of business settings, but we have based our list around a restaurant setting. 

 Reporting our Mystery Shopper Experience Services

As mentioned, our mystery shopper experience investigations are designed to give a full and honest review of the establishment we visit. Our reports will highlight everything we have witnessed from start to finish which will naturally position business owners in informed positions on how to improve their operations or praise staff who are performing to, or exceeding expectations.

Our mystery shopper reports will be categorised with details and stills imagery to evidence our findings. We list the operational positives and negatives of a business, but we also provide constructive recommendations on how to improve.

mystery shopper reports
Standards of Our Undercover Mystery Shopper Experience Investigations


Our undercover mystery shopper experience services are delivered with integrity and professionalism on all accounts


Our private investigations are conducted with robust ethical standards and accountability at all levels


The mystery shopper experience investigation services we provide are in compliance with UK privacy and data protection laws


A quality service at a cost effective price is what we deliver with both our private investigations and corporate investigations

Setup Your Undercover Mystery Shopper Investigation

Sentry Private Investigators are on hand to deliver professional undercover mystery shopper experience investigations to businesses across the West Midlands, East Midlands and the East of England. If you have any concerns around how your businesses is operating whilst you are not there, contact Sentry Private Investigators Ltd to provide a clear picture of how things look in your absence. At SPI we believe in fair pricing for investigative services. This means you will receive a professional and comprehensive investigation service at a cost effective rate. To arrange your own mystery shopper investigations, call us now on 01217691626, or email us at for your free, no obligation consultation.

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