The benefits of obtaining an agreement in principle go beyond the simple tranquillity that will bring you as a buyer in France. It also sends a very clear message to potential suppliers. The guarantee of prior financial authorization makes you a much safer bet as a buyer who fulfills the obligations arising from the conclusion of the purchase. So you are a more attractive offer than people looking for a property without financing, and that should make you the game when it comes to negotiating a price for the purchase. If you have decided to make a purchase in France, you should also take the next step before making your visit. This step consists of transforming informal correspondence with the broker into a comprehensive and formal agreement with a French lender. To do this, you must complete the application forms and provide complete documentation to the lender. Once in effect, the lender performs the necessary checks and gives prior approval for mortgages up to a certain size of credit.  Please note that in the United Kingdom, for a mortgage to repay a property without property in the United Kingdom, an AIP is a safer indicator of success and, as a general rule, if your documents match what you said to the bank/broker, your mortgage is approved after receiving your application. If you find the property, it may be part of a slightly different project than originally planned. For example, some renovations may be carried out or rental conditions may vary.
It is important that an authorization be significantly different from an agreement in principle (AIP) (sometimes called a decision in principle (DIP) or prior authorisation). In France and the UK, it is very easy to get an IAP. This is essentially a certificate (or, in some cases, an email) that you can get from a bank after your first phone call with the sales team (or in the UK, you can often apply to the major high-street banks, which also do a credit check). In France, banks will offer you an AIP as soon as they ask questions about your income and expenses, and they will explain that, based on this information, you should be eligible for a mortgage with that lender. You can also tell yourself what the maximum credit size might be. Although this gives you an indication of what you are eligible for, it is NOT a guarantee, despite what they can tell you. (Remember, these are the bank sales teams, they have no mortgage qualifications and are intended to bring potential customers to their system, not on the number of mortgage offers issued). This guarantee can only be obtained when you have submitted all the necessary documents (not only your payslips and tax returns, but also proof of all other contractual debts and regular income, identity documents and statements) and a sub-holder has analyzed and approved your file.