This all depends on transfer limits. Some services limit how much money you can send in one year or over 180 days. OFX supplies some even more detailed answers. They report that most of the major currencies like the American dollar don’t have restrictions with their service.
Other currencies such as the Yuan from China or the Rand in South Africa can be subject to governmental regulations.
Reasonable Costs
Other services impose transfer limits to keep their costs reasonable. You might be limited to how much you can send in 24 hours or the course of one week. Some companies will limit how much you can send over a month. Find out if the services have an option to use debit cards. The provider should also have information on using a debit or credit card.