locating an a/c number for my prepayment electricity meter

I do not seem to be able to LOCATE an account number for my prepayment electricity meter
I have received notice of my entitlement to £140 Warm Home Discount, ~the confirmation of which, requires that I provide the A/C number
Can anyone assist me with that, please ?
Thank you

Hello @DaveyB

Bulb tend not to use account numbers, but if you contact them direct during working hours they will be able to provide the information you require, their contact details can be found via this link: https://help.bulb.co.uk/hc/en-us/articles/115001240291-How-can-I-get-in-touch-with-Bulb-

@DaveyB Do you mean account number or serial number of your prepayment meter? If serial number it is normally located next to a barcode.