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# Recital 29

*In force · Directive 2002/58/EC, OJ L 201, 31.7.2002 · Checked against EUR-Lex on 1 Nov 2026 · [Official source](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32002L0058)*

The service provider may process traffic data relating to subscribers and users where necessary in individual cases in order to detect technical failure or errors in the transmission of communications. Traffic data necessary for billing purposes may also be processed by the provider in order to detect and stop fraud consisting of unpaid use of the electronic communications service.