Availability of cenvat credit

The cenvat credit shall be taken by the provider of output service as the case may be, on the basis of a supplementary invoice, issued by a provider of output service, in terms of the provisions of service tax rules 1994 except where the additional amount of tax became recoverable from the provier of service on account of non-levy or non-payment or short-levy or short-payment by reason of fraude or collution or wilful mis-statement or suppression of facts or contravention of any of the provisions of the finance act or of the rules made thereunder with the intent to evade payment of service tax under  rule 9(bb) of cenvat credit rule 2004.

Yes your client can get the Cenvat credit on the basis of Suppl Invoice issued by you, because suppl. invoice has been prescribed as a document to be gogd enough for claiming cenvat credit  under Rule 9 of Cenvat Credit Rules, 2004 .