If you don't send out invoices, you won't get paid. In our experience, if you stay on top of your invoicing, after choosing your clients wisely, you'll have very few problems with uncollected bills. When you do, make sure you follow up every phone conversation with a letter to your contact person at the company. As mentioned earlier, the best way to avoid such difficulties is to be selective about who you take on as a client. Professional ethics is an important consideration for an independent contractor in any field.
Many professions have a written code of ethics.
If yours does, it's a good idea to read it and know what's in it. If you always tell clients the truth and keep them fully informed on events affecting assignments you perform for them, you'll go a long way toward avoiding any ethical problems and conflicts. Angle for more assignments. The importance of repeat business lies simply in the fact that it costs more money to develop proposals and to seek out new clients. When you're selling, you're not making money.