Reference letter from former employer / boss providing a bad reference - average employee with poor performance.
[He/She] showed very little commitment in [his/her] work and the work product were less than satisfactory. We spoke to [him/her] about [his/her] work ethics and concluded that it was too difficult to motivate [him/her]. [He/she] left with the understanding that it was for mutual benefits.
letter of reference,
letter of recommendation,