In a many to one transfer a number of existing share certificates will be selected and transferred to the same new share certificate. The best way to do this is to buyback the original share certificates and then allot the share to the new share certificate.
E.g. Shareholder A - 20% B - 30% C - 50% transfer to D. The transfer screen will be as follows:
Cert no. 1 A___ 20%______D ____Cert no.4
2 B___ 30%______D ____Cert no.4
3 C___ 50%______D ____Cert no.4
Buy back A, B and C and allot a new certificate 4.