Germans quiz C. Suisse clients in tax probe-paper

* German prosecutor's office sends 24 questions

* Credit Suisse clients asked if tax was discussed

* Swiss newspaper prints photo of questionnaire

ZURICH, Aug 11 (Reuters) - German authorities have sent a questionnaire to German clients of Credit Suisse (CSGN.VX) in a bid to establish whether Switzerland's second-largest bank helped them dodge taxes, a Swiss paper reported on Tuesday.

The daily Tages-Anzeiger printed a photo of part of a form from the chief prosecutor's office in the western city of Duesseldorf that listed two questions -- what the clients' account numbers were and why they had chosen to place their funds with a Swiss rather than a German bank.

A spokesman for Credit Suisse declined to comment on the newspaper report. A spokesman for the Duesseldorf prosecutor's office also declined to comment.

In July, about 150 German officials and prosecutors raided Credit Suisse's private banking offices in that country, netting huge amounts of data and more than 100 boxes of material, after tax authorities obtained a compact disc with names of 1,500 alleged tax dodgers earlier this year. [ID:nLDE66F1HT]

That was the latest episode in an international crackdown on suspected tax cheats in offshore centres.[ID:nLDE62N1RZ] Last year, Swiss wealth management giant UBS (UBSN.VX) agreed to a hefty settlement after a bitter U.S. tax probe.[ID:nLDE65G0EZ]

The Duesseldorf prosecutor's office had sent the clients a total of 24 questions, the newspaper said, including whether there had been any discussion that the funds would not be taxed, whether there had been a courrier service for transferring funds and whether the possibility of opening two accounts, with one for untaxed wealth, had been addressed.

The investigation also comes as Germany and Switzerland try to establish a double-taxation agreement that could turn up billions of euros of undeclared German cash possibly held in Switzerland. (Reporting by Catherine Bosley; additional reporting by Edward Taylor in Frankfurt; Editing by Hans Peters)