Work permit is one certificate that Vietnam government permit foreign labors (Expats) working in Vietnam legally. In Vietnam, work permits are valid for a maximum of three years depending on the contract.

Requirements For Foreign Citizens (Expats) can extend Vietnam work permit
The employer has planned and is conducting training of Vietnamese employees to perform the jobs currently performed by foreigners but Vietnamese employees are still unable to perform these jobs and foreigners commit no breaches of labor discipline as stipulated at Points b and c, Clause 1, Article 84 of the amended and supplemented Labor Code (Extension of the period for wage increase to no more than six months or transfer to another position with a lower wage for a maximum period of six months, or removal from office or Dismissal)
The foreigner works in Vietnam for Performing economic, commercial, financial, banking, insurance, scientific and technical, cultural, sports, education or healthcare contracts or Working as contractual service providers and his/her jobs require more than 36 (thirty six) months.

Requirements time For Foreign Citizens (Expats) to obtain Vietnam work permit extension
At least 30 (thirty) days before a work permit expires, the employer or the Vietnamese party shall submit a dossier of application for extension of a work permit to the provincial-level Labor, War Invalids and Social Affairs Service which has granted the work permit.
Within 15 (fifteen) days after receiving a complete and valid dossier of application for extension of a work permit, the provincial-level Labor, War Invalids and Social Affairs Service shall extend the work permit. In case of refusal to extend the work permit, it shall issue a written reply stating the reason.

To obtain Vietnam Work Permit Support Authorization (Official Work permit from Vietnam), please come to http://rushvietnamvisa.com/extend-work-permit/ for more assistance.