Japan Subculture Research Center. If you click here, you can read the whole article. An excerpt is below:
Could you imagine if you had a wife or girlfriend that was sneaking off every day to work in the sex business while you’re in the office? Probably the majority of people couldn’t, and thus covering up a “high-income part-time job” is a real worry for a lot of fuzoku girls.
For a mere ¥5,000 a month, a girl can have a fake pay stub mailed to her home with the name of a temp agency, ad agency, real estate agent or retail business. Shop owners can get discounts when registering a group of women, which is how many fuzoku businesses advertised in magazines can provide alibi services to employees. The services specialize in other business as well, such as creating false documents such as statement of income for those looking to take out a home loan, finding a guarantor for those looking to rent an apartment, or proof of employment for those who want to put their children in daycare but don’t have a job.