How to join online

If you meet our common bond requirements below, you can become a member by joining online or by completing a paper form.

  • If you live or work in the Borough of Dudley or the County of Worcestershire

  • If you are employed by, or a tenant of these housing associations

  • If you are employed by any of the following organisations:
CHADD Housing Association Dudley College Dudley Council
Dudley Group of Hospitals Dudley Walsall Mental Health Trust
GKN National Express Rentokil
Rooftop Housing Association West Midlands Ambulance Service Worcestershire Acute NHS Trust


If you wish to apply for your Engage account and card, please print and complete the form or alternatively you can fill this in at our branch. 

Please do not apply if you do not meet any of the above criteria as you are not eligible to join Castle & Crystal. You can find your local Credit Union using the Find Your Credit Union tool.


We require two forms of identification to open your account. If you do not pass the electronic identification check online, name and address identification documents will be requested by email before your account is opened.

Name identification includes: full UK driving license, passport, DWP benefit letter

Evidence of address includes: Recent utility bill, bank statement, council tax bill, DWP benefit letter

All documents must be originals and up to date.


To complete the membership application process, a £4 debit card payment is required to activate your account. (Please note £3 is a non refundable administration charge)

Your application will be processed once we have received your identification documents and your membership fee. You will receive your welcome letter within 3-4 working days.