The issue doesn't center around how "ta and broker work together" except as it concerns the securing of Items 2&3 below, which is a sample letter taken from the:
GUIDELINES OF THE SECURITIES TRANSFER ASSOCIATION Section 13 Restricted Securities Guidelines
“EXHIBIT K” (FROM TRANSFER AGENT) TO: BANKS AND BROKERS RE: RESTRICTED TRANSFERS
Effective [March 20, 2000] all restricted certificates presented to us for transfer must be submitted in good order for transfer or they will be immediately rejected with a notice of deficiencies to be cured. The Paperless Legal Program does not eliminate the requirement for appropriate legal opinion, releases or other documents set forth in this Section. “In good order for transfer” means that the following documentation must accompany the certificate(s): 1. An appropriate endorsement with Medallion signature guarantee; 2. Corporate resolution where appropriate. The corporate seal should be affixed, and the resolution dated within thirty days of submission to the Transfer Agent. If the registered owner is a corporation, the endorsement must include the officers title, and be signed by an officer other than the one executing the assignment; 3. A copy of the appropriate opinion from Issuer’s counsel, addressed to the Transfer Agent, covering the specific transfer or reference to a blanket opinion previously issued covering multiple transfers including the one submitted; 4. A certification of sale (past tense) from the presenter/broker, if appropriate. If the sale is covered by a Registration Statement, a certification of sale pursuant to the Prospectus with a reference to the date of the Prospectus. Very truly yours,