Hysbyseb ar y teledu, y radio neu ar wasanaeth ar alwad

The Advertising Standards Authority (ASA) handles complaints about these issues on Ofcom’s behalf.  You can submit a complaint to the ASA.

The BBC is prohibited from carrying advertising and product placement on its TV channels and radio stations funded by the licence fee. If you are concerned about any of these issues in relation to these BBC services you should complain to the BBC.

Ofcom handles complaints about these issues on all other TV channels and radio stations. Please complete our TV and radio programme complaint form.

Ofcom handles complaints about these issues. Please complete our TV and radio programme complaint form.

You should complain to the BBC in the first instance.

S4C's Clic - You should complain to the S4C Authority in the first instance.

If you are dissatisfied with the response from the BBC or S4C Authority you can complain to Ofcom by completing our on demand programme service complaint form.

These services are not subject to Ofcom's Broadcasting Code, but they must abide by a set of minimum standards under European law.

If you've seen a sponsorship message or a reference to a product, service or brand on a video-on-demand service which concerned you, please contact the service provider. A list of service providers.

If you are dissatisfied with the response you receive, or you can’t find the video-on-demand service provider on the list, you can complain to Ofcom using our on-demand programme service complaint form.

If you’re concerned about an advert you’ve seen on an on-demand service, you should submit a complaint to the ASA.

The Advertising Standards Authority regulates online advertisements. You can submit a complaint to the ASA

Radio-on-demand services (with the exception of those provided by the BBC and S4C) are not regulated. If you have a complaint about content on a radio-on-demand service, you should contact the radio service provider.

Ofcom's Code on the Scheduling of Television Advertising (COSTA) sets out rules such as the maximum amount of advertising and the number of advertising breaks within a programme.

Ofcom conducts monitoring of broadcasters' compliance with COSTA. If, however you wish to submit a complaint about a particular instance on a TV channel, please complete our TV and radio complaint form.

There are no rules about the amount of advertising on radio (but there are some licence requirements for community radio stations). You may wish to contact the relevant broadcaster if you have any comments about their advertising schedule.  List of our licensed radio broadcasters.

There are no rules about the amount of advertising on on-demand services. You may wish to contact the relevant service provider. List of the providers we regulate . Radio-on-demand service providers are not regulated.