(a) Requirement. Every petition or other paper of a person represented by an attorney shall be signed by at least one attorney who has been admitted to practice law in this State and who complies with Rule 6-135. Every petition or other paper of a person who is not represented by an attorney shall be signed by the person. Every paper filed shall contain the address and telephone number of the attorney, or if there is no attorney, of the person by whom it is signed.

(b) Effect of Signature by Attorney. The signature of an attorney on a paper constitutes a certification that the attorney has read the paper; that to the best of the attorney's knowledge, information, and belief there is good ground to support it; and that it is not interposed for improper purpose or delay.

(c) Sanctions. If a paper is not signed as required (except inadvertent omission to sign, if promptly corrected) or is signed with intent to defeat the purpose of this Rule, it may be stricken and the action may proceed as though the paper had not been filed. For a wilful violation of this Rule, an attorney is subject to appropriate disciplinary action.