What is northwest federal credit union? Northwest Federal Credit Union has been open since 1947. It's the 4th largest credit union in Virginia with assets totaling $3.38 Billion and providing banking services to more than 270,000 members.How do i contact northwest fcu in herndon? Contact the Herndon Main Officelocation at 200 Spring Street by calling (703) 925-5145 or contact the credit union by any of these means: Phone: (703) 925-5145 Toll Free: (844) 709-8900 Fax: (703) 925-5113 Mailing Address: Northwest FCUHow do i file a dispute with northwest federal credit union? If you wish to contact Northwest Federal Credit Union and obtain information about your current mortgage loan or about any errors regarding your mortgage loan, please submit your dispute in writing to the following address: P.O. Or, you may contact the Loan Servicing Department directly at 844-709-8900.How do i contact northwest fcu manassas branch? Contact the Manassas Branchlocation at 9730 Liberia Avenue by calling (703) 925-5147 or contact the credit union by any of these means: Phone: (703) 925-5147 Toll Free: (844) 709-8900 Mailing Address: Northwest FCU PO Box 1229