Complaints and investigations
We take all complaints seriously and assess them against the UK Advertising Codes. We do not make decisions based solely on the number of complaints an ad receives – a single complaint can be enough for us to take action if there appears to be a problem under the rules.
We accept complaints from both the public and the industry. We protect the anonymity of members of the public who complain to us unless there is a good reason to reveal their details and we have their permission to do so (for example, if they want their name removed from a mailing list). If a complaint is made by someone acting in an official capacity – for example, on behalf of a competitor – we will require their organisation to be identified.
Complaints are assessed using our prioritisation principles to help determine the most appropriate course of action. Under these principles, we consider:
- what harm or detriment has occurred or might occur
- the likely risk of action versus inaction
- the likely impact of our intervention
- what level of resource would be proportionate to the problem being addressed
We will contact the advertiser whenever a complaint suggests that an ad may have broken the rules, but we do not formally investigate every case.
Around 80% of complaints do not raise issues under our rules, allowing us to resolve matters without taking further action against an advertiser.
How long does the process take?
We try to resolve complaints as quickly as possible, while ensuring our investigations and decisions are thorough and robust.
Straightforward complaints that do not raise issues under the rules can sometimes be resolved within a few days. Where we need to contact an advertiser, timescales will depend on the complexity of the issues and whether the advertiser agrees to amend or withdraw the ad without the need for a formal investigation.
A small number of particularly complex cases can take six months or more to complete – for example, where independent experts are needed to assess evidence.
Communication during the process
Our Complaints Team will first assess whether the issue you have raised falls within our remit. We will then assess the complaint against the advertising rules, using our prioritisation principles to help determine what action to take.
We will let you know if:
- your complaint raises a potential issue under the Codes
- we decide to investigate further under our formal procedures
- your complaint is referred to the ASA Council for a view on whether further investigation is needed
Otherwise, we will keep a record of your concerns and use them to help inform our wider regulatory work, but you may not receive further updates beyond an acknowledgement that we have received your complaint.
Multiple complaints
A large number of complaints about an ad can indicate that there may be an issue we need to investigate. However, we also need to avoid being unduly influenced by coordinated complaint campaigns, such as online petitions or large volumes of complaints generated from template emails.
This may mean we are unable to respond individually to everyone who contacts us. However, if we identify a problem under the rules, we will still take action.
Complaints about broader advertising practices across a sector can place greater demands on our resources, and we may deal with these cases differently – for example, by taking a project-based approach. This allows us to investigate a number of related issues under a smaller number of “master” complaints.
ASA rulings apply to all advertisers, so rulings in these cases can help bring a wider industry or sector into line with the rules.
Where appropriate, we may also work with trade bodies and provide guidance to help advertisers understand the outcome of our work and what it means for their sector. We will monitor compliance and take further action where necessary.
Cross-border complaints
If a complaint relates to an ad that originated outside the UK, it may be treated as a cross-border complaint. Where possible, the ASA will refer the complaint through the European Advertising Standards Alliance (EASA) to the regulator in the country where the ad originated. Like other complaints to the ASA, cross-border complaints are handled free of charge.
We also do our best to address complaints about ads from countries without EASA links where those ads are directly targeting UK consumers (for example, through a .co.uk website or UK pricing). However, our powers are more limited when dealing with ads outside our jurisdiction.
Complaints process timeline
Further information:
Making an ad complaint guide.pdfComplaint about your ad guide.pdf
Non-Broadcast Complaint Handling Procedures
Broadcast Complaint Handling Procedures

