If it is mutually agreed that the employer should keep the bank account book, the FDW must be given access to the book at all times to check that payments are credited promptly and regularly.

The employer must also keep a record of the monthly salary paid to the FDW, and should be able to produce this record at the request of any authorised public officer.

http://www.mom.gov.sg/foreign-manpower/passes-visas/work-permit-fdw/before-you-apply/Pages/default.aspx#salary