Yes, on request.
However - here are our thoughts on CoAs:
The vast majority of our artefacts, and those sold by other dealers, come from private collections that have recently made their way onto the antiquities market (normally via inheritance). These collections often represent a lifetime's effort by the collector and may have been sourced from many different countries.
Therefore, provenance of individual items is usually lost, there will be no recorded archaeological context, and the artefact may have been cleaned and preserved by well-intentioned but clumsy amateurs.
The end result is that the only way to truly guarantee authenticity is via radiometric dating - a process that often costs more than the end-value of the artefact (unless it's a particularly valuable piece). For this reason, we at Timeless select our suppliers with great care, but we do not routinely supply CoAs. We would also suggest that you, as a buyer, should treat any seller that does supply CoAs with a degree of caution.