All the banks, building societies and insurance companies, listed alphabetically below, accept signatures of AIA practising members on the accounts of clients seeking finance and mortgages.

• Alliance and Leicester
• Amber Homeloans
• Bath Building Society
• Beverley Building Society
• Bradford and Bingley
• Bristol and West Building Society – subject to inclusion of IR final assessment.
• Britannia Building Society
• Buckinghamshire Building Society
• Cambridge Building Society
• Chelsea Building Society
• Cheltenham and Gloucester
• Cheshire Building Society
• City of Derry Building Society
• Commercial First Mortgages
• The Co-operative Bank
• Coventry Building Society
• Darlington Building Society
• Derbyshire Building Society
• Earl Shilton Building Society
• First Active Financial plc
• First National Mortgage Company
• Freedom Lending
• Future Mortgages
• GMAC Residential Funding Ltd
• Godiva Mortgages
• Harpenden Building Society
• HBOS
• Household Bank
• HFC Bank
• High Street Homeloans
• Hinckley and Rugby Building Society
• Horserace Betting Levy Board
• Holmesdale Building Society
• HSBC – on a case to case basis.
• Intelligent Finance
• Ipswich Building Society
• Leek United Building Society – subject to inclusion of IR final assessment.
• Lloyds TSB
• London Scottish Bank
• Loughborough Building Society
• Manchester Building Society
• The Melton
• Mercantile Building Society
• Mortgage Express
• Mortgagematch Home Loans Ltd
• Nationwide Building Society
• Newbury Building Society
• Newcastle Building Society
• Northern Rock – Northern Rock requires completion of a pro-forma certificate.
• Norwich and Peterborough Building Society
• Nottingham Building Society
• Optoma Broker Solutions
• Paragon Group of Companies
• Penrith Building Society
• Portman Building Society
• Santander UK plc
• Scarborough Building Society
• Scottish Building Society
• Shawbrook Bank
• Skipton Building Society
• The Staffordshire
• Stafford Railway Building Society – on a case to case basis.
• Stroud and Swindon Building Society
• Sun Bank
• Teachers Building Society
• Tipton and Coseley Building Society
• Universal Building Society
• Victoria
• West Bromwich Building Society
• Yorkshire Building Society