Through Transport Mutual Insurance Association Limited and TT Club Mutual Insurance Limited, trading as the TT Club. TT Club Mutual Insurance Limited is regulated in the UK by the Financial Services Authority, in Hong Kong by the Hong Kong Insurance Authority, and in Singapore by the Monetary Authority of Singapore. In the United States, TT Club Mutual Insurance Limited is approved as a surplus lines insurer in most states and is accessible through properly licensed surplus lines brokers.

The UK VAT Identification number for Through Transport Mutual Insurance Association Limited is: GB 564 5244 35 and for TT Club Mutual Insurance Limited is: GB 564 3375 30
The Italian VAT Identification number for TT Club Mutual Ltd is: 03627210101