There is no prescribed manner in which an employer forwards payroll giving donations to the relevant charity.
The employer can choose the payment method most suited to themselves.
The only legal stipulation is that donations are forwarded to the charity within 3 months of the deduction having been made.
Payments can be made electronically or by cheque. It is the employer's choice.
It is Ace Payroll's suggestion that charitable donations be forwarded to the relevant charity monthly as part of the employer's monthly PAYE process.