If you are an accountant and you have a client that you have worked with several times, it is inevitable that you know one or two of the ways they tend to behave, and on some occasions, a bond of trust has been created, but despite the fact that you can establish a friendship and trust with your client, the best thing is that your professional relationship is always clear.
Maybe they are dissatisfied with the last accounting service that you offered them; it could be this time it was because they didn’t like the proposed pricing on a fee schedule. Whatever the case may be, you probably have an idea of what could be so it is better to maintain a good relationship with your client and have an engagement letter.