Keep getting phone calls at work.  The voicemail message left by NCA (National Credit Adjusters indicates that they are looking for my employment location verification only.  Then, they faxed my work with letter asking for my employment dates and for 'verification of location only'.  I've been ignoring them, can they really keep bugging my work?  

Got the same call. She called asking for my info such as ssn etc... Didn't give her the time of day

She said she was with National Credit Adjusters. Collection agency