It is always better if you could try and replicate your actual signature that has been used in mportant documentation proceedings as it manifests indvidual identity. In most situations one might face difficulties with signature mismatch when it comes to cheques, and other bank proceedings. One of the ways to get yourself out of such situation is to approach your bank and fill thier form regarding change of signature or submit an affidavit stating that this is your signature and you are the official account holder.
But keep in mind that cheque bouncing due to mismatch of signatures can lead to criminal proceedings under S. 138 of the Negotiable Instruments Act, 1881. The same was upheld by the Supreme Court in the case of M/S Laxmi Dyechem vs State Of Gujarat.