1. A set of minimum standards, which applies to ISAs that meet the terms laid down by the government. An ISA that complies with these terms bears a CAT mark giving assurance under three headings: Charges, Access, and Terms (hence CAT). The assurances are that there will be either no charges or reasonable charges, easy access to funds at any time, and no unfair terms hidden in the small print. It also guarantees that any increases required as a result of a change of base rate will be made within one calendar month. CAT marking does not, of course, guarantee that a particular ISA will be profitable.
2. Denoting a mortgage that complies with similar government-set standards. The basic rules are that interest should be calculated daily, documentation should be clear, and that there should be no hidden or unreasonable charges.