WePay uses your Social Security Number (“SSN”) as part of its identity verification program. 

WePay verifies the identity of each user of the WePay service in order to manage risk and to comply with anti-money laundering laws. If you are an individual or sole proprietor, WePay will also use your SSN. If you are acting on behalf of a corporation or other organization with an Employer Identification Number (“EIN”), WePay will use the EIN.

Even if you are acting on behalf of an entity with an EIN, WePay requires your SSN so that WePay can verify who you are and that you are authorized to act on behalf of the entity.  All of the information you enter on WePay is kept safe by bank-level security measures.